Where the Shark Loses Its Name

The Scalloped Hammerhead Shark in Sri Lanka

Picture this.

You are moving through warm seawater, unhurried, alert and not especially interested in the human need for labelled things. Light breaks above you into silver pieces. Fish pass in flashes. Somewhere beyond the blue are reefs, open water, boats, nets, hooks, landing sites, markets, permits, records and rules.

None of them are drawn on the water.

The sea does not provide signboards, lane markings or a helpful little arrow saying, "Important conservation complication, 300 metres ahead". It simply moves. And so do you.

Then there is your head.

It is not subtle. Human beings look at it and immediately reach for household objects, because apparently our first response to wonder is to open a kitchen drawer. Radar dish. Dinner tray. Navigation equipment. None of these descriptions are quite right, but together they admit the truth: this shark seems built for a world where direction matters.

This is the Scalloped Hammerhead Shark, Sphyrna lewini, an animal that seems to carry its own question mark through the water.

It is a large, wide-ranging marine predator recorded from Sri Lankan waters. It moves through a world where borders are invisible but consequences are not.

So this is not just a story about a strange-looking shark.

It is also a story about routes.

A systems story led by an unhurried navigator.

Do What You Can Do: Send this link – www.srilankasendangered.com/click – to a photographer

Why This Matters

The Scalloped Hammerhead belongs to the hammerhead shark family, Sphyrnidae.

It is not endemic to Sri Lanka. It swims across warm temperate and tropical seas, including the Indian Ocean, and it appears in Sri Lankan fisheries evidence.

Globally, it is listed as Critically Endangered, and its population trend is assessed as decreasing. The Indian Ocean picture is also difficult to manage because there is not enough data for a quantitative assessment.

That combination matters.

Not because we need to panic.

Because we need to see clearly.

The Scalloped Hammerhead is coastal-pelagic and semi-oceanic. In plain English, it can use coastal and offshore waters rather than staying neatly in one place for our administrative convenience.

That is awkward for humans.

We like boxes. Sharks prefer routes. We file things. Sharks move through water, which has never once apologised for being inconvenient.

The species feeds on fish, rays, other sharks, squid, lobsters, shrimps and crabs. This places it in the upper levels of marine food webs, but we should be careful with the grand language.

We do not need to pretend the whole ocean depends on one shark to see that it has a place in the system.

For Sri Lanka specifically, the strongest public evidence is not a complete picture of its ecological role, breeding areas or local population trend. The clearest evidence is that the species appears in landings and is connected to a wider fisheries, trade, identification and management system.

That is the real story.

A shark can be present in the sea.

Then present in a fishing record.

Then present in a market.

Then almost absent from public understanding because nobody knows exactly what it was, where it came from or how it moved through the system.

The Scalloped Hammerhead shows us how easily a species can slip from being a living animal into a category.

“Shark”.

“Fish”.

“Product”.

“Bycatch”.

“Export”.

Each word may be useful.

Each word can also hide the animal.

And once the name begins to disappear, the map begins to blur.

The Challenge Is Not One Villain

The Scalloped Hammerhead’s problem in Sri Lanka is not one villain with a moustache and a boat.

It is more ordinary than that.

Which somehow makes it harder.

The strongest verified pressure is sharks dying because they are caught in fishing operations.

In Sri Lanka, the issue is not usually a boat going out with a sign saying, “Today we hunt Scalloped Hammerheads”. Conservation would be much easier if problems wore uniforms and introduced themselves at the harbour.

The shark appears inside a wider fishing system involving tuna, billfish, gillnets, longlines and other gears.

A gillnet is a wall of netting in the water.

A longline is a long fishing line carrying many baited hooks.

These are ordinary fishing methods used by ordinary people trying to make a living. The problem is that ordinary methods can still catch extraordinary species.

A Scalloped Hammerhead may be caught when fishers are targeting other species. Once caught, sharks may be retained for meat, fins or trade value.

This is why blaming fishers is too simple.

And usually unhelpful.

The evidence points to a system: fishing pressure, bycatch, retention, domestic meat demand, export value, incomplete species-level data, identification difficulty, the difficulty of following rules in real life and the need for better management.

That is a lot less satisfying than finding one villain.

It is also much closer to reality.

In one Sri Lankan shark fisheries survey, Daniel Fernando and Akshay Tanna recorded 43 Scalloped Hammerheads across 540 survey days at 19 landing sites from August 2017 to August 2019.

That number matters.

But carefully.

It is a survey result, not a national population estimate.

It tells us the species appeared in Sri Lankan landings during that survey. It does not tell us how many Scalloped Hammerheads are in Sri Lankan waters, whether the local population is rising or falling, or where exactly the animals are breeding or moving.

That is not a weakness in the story.

That is the story.

Because one of the central problems is not only what is happening to the shark.

It is also whether the system can see the shark clearly enough to make good decisions.

And that brings us to the quieter disappearance.

The Shark Can Disappear Twice

A Scalloped Hammerhead can disappear from view in two ways.

First, it can decline in the ocean.

Second, it can disappear inside human systems.

That second disappearance is quieter.

A whole shark, with its extraordinary head, is easy enough to recognise.

But shark meat and fins are different.

Once processed, shark products can be difficult to identify visually to species level. A piece of meat does not arrive at the market with a polite little label saying, “Good morning, I used to be Sphyrna lewini.”

This is why species-specific landing data, DNA barcoding, inspection training, trade traceability, CITES trade checks and better reporting are not boring technical details.

They are the map.

Without them, even careful people can end up making decisions through fogged glass.

And as a general rule, fogged glass plus perfectly normal human confidence can cause a surprising amount of trouble. This is not only true in conservation, but conservation is kind enough to provide examples.

The Sri Lankan evidence also points to a wider shark value chain. Shark products can move through specialised but flexible buyers and traders. Some people rely on shark trade income. Shark meat may be sold in forms that make species identification difficult.

That matters because good conservation cannot pretend the market is made of cardboard.

It is made of people.

Fishers. Buyers. Sellers. Traders. Inspectors. Researchers. Families. Restaurants. Hotels. Customers.

A systems lens would say the question is not simply, “Who is doing the wrong thing?”

A better question is,

Where does the name of the shark get lost?

At sea?

At the landing site?

At the market?

At the export point?

Inside public understanding?

Once you ask that, the route becomes clearer.

And once the route becomes clearer, the work becomes less mysterious.

Who’s Doing Something About It

The people and systems visible on the public record are not gathered around one single “Save the Scalloped Hammerhead in Sri Lanka” programme.

That is important.

This is not one heroic doorway.

It is a corridor.

The work looks less like one grand rescue and more like many careful hands passing the shark’s name along: monitoring, identification, DNA work, fisher engagement, CITES support, trade assessment systems, customs enforcement, fisheries management, rule-awareness research and regional Indian Ocean reporting.

This is less cinematic than a lone scientist leaping into the sea with a clipboard and perfect hair.

But it is probably closer to how conservation actually works.

The route is built by people who count, identify, sample, review, train, coordinate, check permits, improve records and ask better questions.

It is not one dramatic rescue scene.

It is many people keeping small pieces of the map from going missing.

The People Already Helping

At the landing-site end of the route, Daniel Fernando is one of the clearest names on the public record and in the work of turning shark and ray fisheries evidence into something Sri Lanka can actually use. He co-authored the 2019 paper that recorded Scalloped Hammerheads in Sri Lankan shark fisheries survey work.

Beside that work is Akshay Tanna, also connected to Blue Resources Trust, co-author of the same 2019 paper and publicly linked to the less glamorous but essential world of fisheries programme work, monitoring, data systems and CITES-related work.

Together, their visible work matters because the Scalloped Hammerhead issue depends heavily on field evidence becoming usable knowledge.

A shark seen at a landing site is one thing.

A shark properly recorded, identified and connected to management decisions is another.

Further along the route, the Peiris et al. 2021 DNA barcoding work matters because it tackles the moment when the shark stopped looking like a shark and started looking like a mystery on a table.

R R M K P Ranatunga, linked to the University of Sri Jayewardenepura, is one of the visible names connected to that DNA barcoding pathway, where a species name may have to be recovered by lab work rather than by eyesight.

Lasuni Godage and the wider regulation-awareness research pathway bring the camera back to people: how fishers may understand, experience or struggle with shark-fishing regulations.

That is not a side issue.

If rules do not match lived reality, they may sit in the system like an unused life jacket.

Claire Collins and the wider shark value-chain research team move the camera into trade and livelihood: dried shark-meat demand, market actors, income reliance and why shark products matter to some communities.

That matters because sharks are caught not only in nets.

They are also caught in economies.

And economies are made of people trying to live.

The public record also points to older Sri Lankan fisheries data, including work such as the 2016 IOTC paper by R A M Jayathilaka, which helps show that Scalloped Hammerhead records did not appear out of nowhere. Older evidence should be treated as historical context, not as proof of current status.

The careful version is this:

Many people are helping make sharks more visible in Sri Lanka’s fisheries, trade and data systems.

The public record shows some of them clearly.

Others are harder to see: field data collectors, harbour workers, fishers, lab teams, customs officers, government technical staff and data managers.

They may be doing work that matters without appearing in the headline.

That is worth remembering.

A map is rarely drawn by the person holding it at the end.

It is usually drawn by people who were careful when nobody was watching.

The Systems That Quiet Work Runs Through

If the route begins with a shark becoming visible, Blue Resources Trust and the Sri Lanka Elasmobranch Project matter because they are publicly linked to monitoring, identification, data collection and policy support that help stop the animal from becoming just another blurred entry.

If the route moves into national decision-making, DFAR matters because Sri Lanka’s main fisheries management institution carries the shark-management framework, including the 2025 to 2030 National Plan of Action for Sharks, Rays and Chimaeras. Without that layer, concern has fewer practical ways to become action.

If the route needs evidence, NARA and national fisheries research and data systems matter because management cannot improve what it cannot measure, compare or review.

If the route reaches processed products, DNA barcoding and genetic verification work matter because eyes alone may no longer be enough to keep the species name attached. At that point, guessing is not a method, even if humans have always shown a touching confidence in it.

If the route reaches trade, Sri Lanka Customs and CITES trade-control pathways matter because listed shark products need careful identification and legal handling before they move further.

If the route needs stronger technical capacity, Cefas and related support systems matter because training, data collection and NPOA support help turn good intentions into working practice.

If the route leaves Sri Lanka’s waters, IOTC regional reporting and advice matter because wide-ranging sharks do not stop at national borders just to make regional management tidy.

And one part runs through people who are often least visible: fishers, market workers, food buyers, hotel purchasers, chefs, family shoppers and ordinary seafood customers.

That last part matters for SriLankasEndangered.com.

Not because the public can solve the shark problem alone.

They cannot.

But because public expectations shape the questions that move through families, hotels, events, schools, restaurants and markets.

A species becomes easier to ignore when nobody asks its name.

And asking its name is where ordinary people can enter the route.

What You Can Do: Three Decision Moves

You do not need to become a marine biologist by Thursday.

You do not need to interrogate a fish seller like a detective in a wet-market crime drama.

The first win is simpler.

See the system a little more clearly.

Easy Notice: Notice when the name disappears

The next time you see fish being bought, ordered, served or discussed, notice how often the exact species name is clear.

Is it named?

Is it just called “shark”?

Is it a local name only?

Is it simply “fish”?

This connects to the species identification system.

The Scalloped Hammerhead is one species inside a larger shark and seafood system. The evidence shows that species-level identification matters because processed shark products can become difficult to identify.

You do not need to correct anyone.

Just notice.

If you notice that the name disappears quickly, you have already seen part of the problem.

And if you do not buy seafood or rarely eat fish, that is okay too. The point is not purity. The point is learning how systems hide details.

Practical Shift: Ask one calm sourcing question

When buying fish, ordering fish or helping choose seafood for a home, hotel, event or restaurant, ask,

“What fish is this, and do you know how it was caught or sourced?”

If the answer is clear, useful.

If the answer is “I’m not sure”, also useful.

Now you know where the visibility ends.

If the item is shark meat, shark fin or a shark-derived product, and the species, source or legality is unclear, choose something clearer when you can.

That is the strongest public-facing decision from the evidence.

It does not blame the seller.

It does not ask you to identify Scalloped Hammerhead meat by sight.

It simply says, when the system cannot tell you what the shark product is, where it came from or whether it is legal, a clearer choice is better than a mystery.

This connects to the seafood trade and traceability system.

One question will not rescue a shark.

But repeated calm questions can make unidentified seafood feel less normal.

And that is how public habits sometimes begin to change without speeches, stickers or anyone being trapped at dinner beside a person who has just discovered “systems thinking”.

Deeper System Move: Help one group ask better questions

If you work in hospitality, events, catering, education, retail, media, conservation, fisheries, government or food purchasing, you may be closer to the system than you think.

You could add two simple prompts to a sourcing checklist:

What species is this?

Is the source or catch method known?

If shark products are involved, add:

Are the species, source and legality clear?

This is not a campaign.

It is better housekeeping for decisions.

You could also share this article with someone closer to the route: a chef, hotel buyer, fish seller, teacher, fisheries officer, marine researcher, customs contact, journalist or student.

Not with pressure.

With an invitation.

“This helped me understand why species names and sourcing matter. Is there anything you’d correct or add?”

That kind of question can open doors without making people defensive.

The shark does not need us to shout at the sea.

It needs better navigation.

And navigation improves when more people know what to ask.

The simplest version of that navigation is one small question.

Your One Move

When buying or ordering seafood, ask,

“What fish is this, and do you know how it was caught or sourced?”

If it is shark or the answer is unclear, choose the clearer option when you can.

That is all.

No lecture. No performance. No need to become the person at dinner who has brought a printed seafood policy brief between the rice and the curry.

Just one calm question.

To help with that, we would like to feature the Fish Buying Guide created by Lanka Environment Fund and Club Ceylon, to help people who eat, buy, cook, sell or serve fish make more informed choices over time. If you eat fish, buy fish for your home, cook it for others, serve it in a restaurant, manage a hotel kitchen, work in fisheries or simply know someone who does, please do share this with them. www.srilankasendangered.com/fish-buying-guides

Why This Matters and When You Might Use This

Scalloped Hammerheads are recorded in Sri Lankan shark landings, and shark products can become difficult to identify once processed.

This touches the seafood trade and traceability system, where species names, catch methods, legality and records all matter.

It is realistic because ordinary people already make seafood choices at markets, restaurants, hotels, events and family meals.

You might use this when buying fish for home, ordering seafood at a restaurant, helping plan food for an event or speaking with a hotel or caterer.

Even when the answer is “I don’t know”, you have learnt where the system becomes unclear.

Repeated calm questions can help make clearer seafood sourcing feel normal over time.

And normal is powerful.

Humans are strange that way. We can ignore a problem for years, then change our behaviour because enough people started asking one ordinary question in an ordinary tone.

How To Do This Simply

Ask,

“What fish is this?”

Then ask,

“Do you know how it was caught or sourced?”

If it is shark or if the species, source or legality is unclear, choose a better-identified option when you can.

If you work in hospitality, events, catering, retail or food purchasing, add “species name” and “source or catch method if known” to your sourcing checklist.

If you know someone in fisheries, marine science, customs, hospitality, food sourcing, education, media or government, share this article srilankasendangered.com/fish-buying-guides gently and ask,

“Is there anything here you would correct or add?”

That question keeps the door open.

And open doors are useful things in systems.

Final Thought

The Scalloped Hammerhead does not move through the ocean according to our labels.

It does not know where one management area ends and another begins.

It does not know whether a landing record was filled correctly, a product was identified accurately, a permit was checked or a child in a classroom learned the difference between “a shark” and a species with a particular name, role and risk.

It simply keeps moving.

Unhurried.

Navigating a sea we are still learning how to describe.

The shark already carries its own strange instrument across the water.

Our job is simpler.

Make the route less blurry.

Ask better questions.

Keep the name attached for as long as we can, so the unhurried navigator does not become just another word on a list.

For Advocates

You’re not just reading. You’re helping keep the name attached.

Forward this to at least one other person: a teacher, chef, hotel buyer, student, fisher, researcher, policymaker or friend who enjoys learning how the natural world actually works.

For New Readers

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What We Still Need To Know

The Scalloped Hammerhead is useful to learn from because the evidence is both serious and incomplete.

That is not a contradiction.

It is how real conservation often feels.

Nature and Science

This lens matters because better decisions depend on knowing how the animal actually uses Sri Lankan and Indian Ocean waters.

Where are Scalloped Hammerheads most often being encountered in Sri Lanka-linked fisheries: coastal waters, offshore areas, high-seas routes or a mix?

Are young sharks appearing in Sri Lankan landings in ways that suggest local nursery use, or is that still an open question?

What could tagging, genetics, diet studies and repeated landing-site assessments tell us about whether Sri Lankan records are part of local, regional or wider Indian Ocean movement patterns?

People and Culture

This lens matters because the shark is not moving through an empty ocean. It is moving through livelihoods, habits, markets and daily decisions.

When fishers encounter hammerheads, what choices are realistically available to them at sea?

How do buyers, sellers and consumers understand shark meat, shark fins and the difference between shark species?

Could fisher knowledge improve species reporting if the system was designed with fishers rather than simply delivered to them?

Systems and Policy

This lens matters because a wide-ranging shark needs working systems, not just concern.

How clearly are Sri Lanka’s shark-management actions being implemented, reviewed and communicated under the 2025 to 2030 NPOA?

Can catch reporting, CITES trade controls, customs inspection and non-detriment findings connect more clearly around species-level data?

Where does the chain become blurry: capture, landing site, market, export, reporting or public understanding?

Innovation and Technology

This lens matters because a processed shark product can hide the truth from ordinary eyes.

Could DNA barcoding become a more regular part of landing-site, market or trade checks for threatened sharks?

Can digital tools support clearer species-level records and faster non-detriment finding processes?

How could public observations or photographs help experts without flooding them with unverified claims?

Moral and Emotional

This lens matters because honest care is stronger than dramatic certainty.

Can we teach people to care about a shark while admitting that the Sri Lanka-specific picture is still incomplete?

Can uncertainty make the public more careful rather than more confused?

Can we build trust by saying, “Here is what we know, here is what we do not know and here is who can help us understand more”?

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