The Maldives

An atoll is one of the few landforms whose fishing can be predicted almost entirely from its shape, and understanding the shape is most of the intelligence.

THE STRUCTURE IS A RING, A LAGOON AND A CLIFF. A coral rim encloses a lagoon of moderate depth; outside the rim the reef slope falls very steeply into water thousands of metres deep. There is no shelf, no gradual shoaling and no sediment plume, because there is no land to supply one.

THE CHANNELS ARE THE ORGANS. Gaps in the rim connect lagoon and ocean, and the entire exchange of water passes through them. On an inflowing tide, clean oceanic water pours in; on an outflowing tide, lagoon water pours out carrying whatever it holds. The current through a channel is strong, directional and predictable, and it concentrates plankton and therefore everything that eats plankton.

THAT IS WHY THE MANTAS AND WHALE SHARKS ARE WHERE THEY ARE. Plankton accumulates on the downstream side of the atoll under a given monsoon, and filter feeders gather there. When the monsoon reverses, the aggregations move to the other side of the atoll. This is one of the clearest examples anywhere of a large-animal aggregation being a direct readout of a physical process.

THE OUTER SLOPE IS WHERE THE OCEAN MEETS THE REEF and it is where the pelagic fishing happens: tuna, wahoo, mahi-mahi and trevally patrol the drop-off and the channel mouths, and deep-slope species hold below.

THE LAGOON IS THE NURSERY AND THE BAIT SUPPLY. Sheltered water, patch reefs, seagrass and sand hold juveniles and the small schooling baitfish the tuna fishery depends on. The health of the lagoons is therefore an input to the national fishery rather than a separate conservation matter.

AND THERE IS NO FRESHWATER COMPONENT AT ALL. No rivers, no estuaries, no runoff. A reader arriving with a question about brackish water or river mouths has arrived at the one place in this catalogue where the answer is that the category does not exist.

The species picture here is unusual because the country's most important fish is oceanic rather than reef-dwelling.

SKIPJACK TUNA IS THE NATIONAL FISH BY VOLUME. It is what the pole-and-line fleet catches, what the country exports, and what a very large part of the economy has historically rested on. Yellowfin tuna is the second, taken by pole and line and by handline, and is the higher-value fish.

WAHOO, MAHI-MAHI AND BILLFISH work the same oceanic water and are taken by trolling along the outer slope and around channel mouths.

GIANT TREVALLY AND BLUEFIN TREVALLY HOLD THE CHANNELS AND REEF EDGES, and are the principal quarry of the visiting sport fishery that casts surface lures at them.

GROUPERS, SNAPPERS AND EMPERORS OCCUPY THE REEF AND DEEP SLOPE, and are the target of the traditional handline fishery. Several grouper species have been subject to a live export trade with the consequences this catalogue describes for the Coral Triangle, and the taking of some is controlled.

THE BAITFISH ARE A FISHERY IN THEIR OWN RIGHT. Small sprats, fusiliers and silversides taken from the lagoons at night with lights and fine nets are what makes the pole-and-line method possible. Without them there is no tuna fishery, which is an unusually direct dependency of a large fishery on a small one.

AND THE LARGE ELASMOBRANCHS ARE PROTECTED RATHER THAN FISHED. Whale sharks, manta rays and all sharks carry protection, and shark fishing has been prohibited nationwide since the twenty-first century. The reasoning is economic as much as ecological: a live reef shark seen repeatedly by divers is worth far more to the country than a dead one, and the country made that calculation explicitly. It is one of the clearest cases anywhere of non-extractive value determining fisheries policy.

The pole-and-line tuna fishery is the reason this record exists, and it deserves describing as a method rather than mentioning as a fact.

THE MECHANISM IS BEHAVIOURAL. A boat locates a tuna school, then throws live baitfish over the side. The tuna, competing for the bait, come up behind and alongside the boat in a feeding frenzy. Water is sprayed over the surface, which breaks up the visual outline of the hull and helps disguise it. Crew standing along the rail fish short poles with barbless hooks, swing a tuna aboard, flick it off the barbless hook without touching it, and drop the hook straight back in.

THE SELECTIVITY IS THE POINT. The method takes one fish at a time, from the surface, in a school the crew can see. It catches almost nothing else — no turtles, no dolphins, minimal sharks, and no juveniles of unrelated species. Compared with purse seining, and particularly with purse seining on fish aggregating devices, the bycatch is a small fraction. This is why the fishery is repeatedly cited as an example of a low-impact high-volume method.

THE DEPENDENCY IS THE LIVE BAIT. Everything above requires a supply of small live baitfish, caught in the lagoons at night with lights and fine mesh. That fishery is itself an ecological pressure and a constraint: no bait, no tuna trip. It ties the offshore fishery directly to the health of the enclosed lagoons.

THE COUNTRY PROTECTED THE METHOD BY POLICY. Purse seining has not been permitted in national waters, and the fishery is reserved substantially for national vessels. That is a deliberate choice to keep a labour-intensive, low-impact, locally-owned method rather than accept a more efficient one, and it is a rare example of a state choosing selectivity over yield.

THE HANDLINE FISHERY SITS ALONGSIDE IT, taking yellowfin and reef species, and the traditional night handline trip is the standard recreational form for both locals and visitors.

AND THE VISITING SPORT FISHERY IS TROLLING, JIGGING AND POPPING, worked along the outer slope and channel edges from licensed boats, and is small relative to everything above.

The Maldivian year has no winter and no cyclone season worth the name, so the seasonality is entirely about wind direction.

THE NORTH-EAST MONSOON IS THE DRY, CALM SEASON. Winds are lighter, the sea is settled, visibility is at its best, and the eastern sides of the atolls are sheltered while the western sides receive the current. This is the settled period for boat work and diving.

THE SOUTH-WEST MONSOON IS THE WET, WINDIER SEASON. Stronger winds, more rain, more swell and reduced visibility, with the sheltered and exposed sides of each atoll reversed. Fishing continues — this is not a closed season — but access changes and small-boat work becomes more weather-dependent.

THE REVERSAL MOVES THE PLANKTON AND THEREFORE THE ANIMALS. Because the current through the atolls changes direction with the monsoon, plankton accumulates on the downstream side, and manta and whale shark aggregations move from one side of an atoll to the other across the year. A visitor asking where the mantas are is really asking which monsoon is running.

THE TUNA FISHERY OPERATES YEAR-ROUND, which is unusual and is a consequence of sitting near the equator outside the main cyclone belt. Catches vary with tuna distribution and with the availability of bait rather than with a closed season.

TIDE IS THE DAILY SEASON. The channels flow in and out with the tide, and whether a channel is inflowing or outflowing determines the water clarity, the direction of drift and where predators sit. Local operators plan around the state of tide as a matter of course.

AND THE MOON MATTERS FOR BAIT AND FOR SPAWNING. Live-bait fishing at night with lights works better on dark nights, and a number of reef species spawn on lunar cycles at channel mouths. Both are ordinary planning considerations here rather than refinements.

Maldivian fisheries policy contains two decisions that are unusual enough to be worth explaining rather than listing.

THE SHARK BAN IS NATIONWIDE AND IT IS ECONOMIC AS WELL AS ECOLOGICAL. All shark fishing has been prohibited in national waters since the twenty-first century, following earlier partial bans. The reasoning given publicly was direct: the diving industry's revenue from live sharks substantially exceeded the value of the shark fishery, and a shark seen repeatedly by paying divers earns many times what it earns once on a quay. Whale sharks and manta rays carry their own protection. This is one of the clearest examples anywhere of non-extractive value being decisive in a fisheries decision, and it came at a real cost to the fishers who had held the shark licences.

THE REFUSAL OF PURSE SEINING IS THE OTHER. The country has not permitted purse seine tuna fishing in its own waters and has reserved the fishery substantially for national vessels using pole and line and handline. The effect is to preserve a labour-intensive, low-bycatch method against a more efficient one, deliberately.

THE OCEANIC STOCKS ARE NOT THE COUNTRY'S TO MANAGE ALONE. Skipjack and yellowfin move across the Indian Ocean, and their management sits with a regional commission of the fishing states. A national policy of selectivity coexists with a regional stock under pressure from fleets that do not share it, and that tension is a real one.

REEF PROTECTION IS EXTENSIVE. Marine protected areas, biosphere reserves, protected dive sites and controls on the taking and export of a number of reef species all apply. Where a reef sits next to a resort, the operator's own rules frequently govern in practice.

VISITOR FISHING GOES THROUGH LICENSED OPERATORS in the ordinary case, and where a person may fish is generally decided by the resort, the island council or the protected status of the water rather than by a general right.

AND NOTHING HERE STATES A CURRENT RULE. Protections have been extended and adjusted over time and the authorities above are the durable answer.

This is a small country with a language most readers will not encounter elsewhere, and it has nevertheless given English one of its standard geographical terms.

ATOLL IS A MALDIVIAN WORD. The English term for a ring-shaped coral reef enclosing a lagoon derives from the Maldivian name for the formation, and the country is the type locality for the landform in more than a linguistic sense. It is worth knowing simply because it is one of very few words in this catalogue's vocabulary to come from the Indian Ocean.

KANDU NAMES A CHANNEL THROUGH THE ATOLL RIM, and it is the most operationally important word in Maldivian fishing and diving. Almost every decision about where to fish, dive or drift is a decision about a kandu and which way it is running.

DHONI NAMES THE TRADITIONAL BOAT, a shallow-draught vessel with a distinctive upswept stem, historically sailed with a lateen rig and now generally motorised. The pole-and-line fishery is worked from it, and the design is genuinely local rather than an imported hull.

POLE AND LINE IS A METHOD NAME THAT UNDERSELLS ITSELF. It sounds like a simple description and it names a coordinated operation involving bait supply, school location, water spray and a crew fishing barbless hooks in unison. A reader meeting the term should understand it as a system rather than as a rod.

LIVE BAIT FISHERY NAMES THE DEPENDENCY. It is worth having as a term because it explains why lagoon health is a tuna-fishery question, which is not obvious from the outside.

AND HOUSE REEF IS THE WORD A VISITOR WILL MEET IMMEDIATELY. It names the reef adjacent to a particular island, and it is generally where fishing is most tightly controlled, because it is the reef that island's divers and guests use. Knowing the term is the difference between understanding a restriction and resenting it.

The history of this country is a fishing history more completely than almost anywhere else in this catalogue, because there was never much else.

TUNA AND TRADE WERE THE ECONOMY FOR CENTURIES. With negligible agricultural land, the islands lived on fish and on their position in Indian Ocean trade routes. Dried and smoked tuna was the export product, preserved for a long voyage and traded across the ocean, and cowrie shells gathered from the lagoons were used as currency across a wide part of the world.

THE POLE-AND-LINE METHOD IS OLD. Taking tuna on a pole with live bait is a long-established Maldivian practice rather than a modern conservation initiative that happens to look traditional, and the fishery's continuity is part of why it survived the industrialisation of tuna fishing elsewhere.

MECHANISATION IN THE TWENTIETH CENTURY CHANGED CAPACITY, NOT METHOD. The sailing dhoni gave way to the motorised one, which extended range and reliability without altering the way the fish are caught. That is an unusual outcome: most fisheries that mechanised also changed gear.

TOURISM ARRIVED IN THE 1970s AND BECAME THE LARGER ECONOMY. Resort development on uninhabited islands created a second economy alongside fishing, and it is the source of the diving revenue that later drove the shark ban. It also created a structure in which most visitors experience the country through a resort rather than through its inhabited islands.

THE 2004 TSUNAMI STRUCK A COUNTRY WITH NO HIGH GROUND. Waves crossed low islands rather than breaking against them, causing widespread damage and displacement, and the event is a permanent part of how the country thinks about its own exposure.

AND SEA LEVEL AND CORAL BLEACHING ARE THE PRESENT HISTORY. A nation whose land averages a couple of metres above sea level, whose islands are built by coral, and whose economy rests on reefs and reef-fed fisheries has an unusually direct exposure to both. Major bleaching events have damaged reefs across the atolls within recent decades, and the recovery of those reefs is a national economic question rather than only an environmental one.

The culture here is shaped by an unusual overlay: a genuine fishing society with a large tourism industry built beside it, and the two do not always see the same water the same way.

FISHING IS FOUNDATIONAL RATHER THAN RECREATIONAL. On inhabited islands, fishing is a livelihood and a food source, the pole-and-line crews are skilled professionals, and the fishery has a status in national life that a European reader should not underestimate. Fisherman's Day is a national occasion.

THE NIGHT HANDLINE TRIP IS THE ORDINARY LOCAL FISHING FORM. Going out after dark on a dhoni with handlines for reef and slope species is what fishing means socially here, and it is also the form most commonly offered to visitors.

THE DIVING INDUSTRY IS THE OTHER CULTURE AND IT IS ECONOMICALLY DOMINANT. It values the same reefs and the same animals for not being caught, and its revenue is what made the shark ban politically possible. Where the two overlap — house reefs, protected channels, dive sites — the diving interest usually prevails, and a visiting angler should expect that.

RESORT ISLANDS AND INHABITED ISLANDS ARE DIFFERENT WORLDS. Most tourism happens on islands with no resident local community, and the customs, rules and expectations on an inhabited island are different. That includes what is appropriate to catch and where.

HANDLING IS DEMANDING IN THIS WATER, as everywhere warm. The pole-and-line fishery is a food fishery and dispatches its fish immediately. The sport fishery increasingly releases, and doing so responsibly in warm water with abundant reef sharks requires more care than in a temperate fishery.

AND THE PROTECTED ANIMALS ARE PART OF THE ETIQUETTE. Sharks, mantas and whale sharks are protected and are also the basis of a large industry. Handling, chasing or crowding them is both a legal and a social problem, and the local expectation is unambiguous.

An atoll is a ring of reef around a lagoon, and the water inside has to exchange with the ocean outside twice a day through a limited number of gaps. That single geometric fact produces the Maldives' defining hazard.

THE CHANNELS RUN HARD AND THEY DO NOT LOOK LIKE IT. The volume of a lagoon many kilometres across is forced through passes that may be only a few hundred metres wide, so the stream in a channel reaches speeds no swimmer can make ground against. In warm, clear, glassy tropical water there is almost none of the surface texture that signals current in a temperate estuary — no wind chop standing up against the flow, no cold, no colour change, no debris line. The water looks like a swimming pool and is moving like a river.

AND THE CHANNELS ARE WHERE THE FISH ARE, which is not a coincidence and is the reason this matters to anglers rather than only to divers. Moving water concentrates food and the predators that follow it, so the productive ground and the dangerous ground are the same ground. That is a recurring structure in tropical fishing and the Maldives is its clearest expression.

THE DIRECTION OF THE FLOW IS THE PART THAT DECIDES OUTCOMES. On an outgoing stream a channel sets from the lagoon towards open ocean, and a person or a small craft in it is being carried away from land, in deep water, in a place where the next land downstream may be a long way off or nowhere. That is a fundamentally different problem from being carried along a coast. Know which way the water is going before entering it, and treat an outgoing channel as somewhere not to be rather than somewhere to be careful.

THE SURROUNDING REEF ADDS THE SECOND LAYER. Fire coral, urchins, stonefish and scorpionfish occupy the reef flats and the channel margins, and the injuries are punctures and envenomations rather than lacerations. Rigid footwear on any reef, no hand-holds on unidentified coral, and no barefoot wading.

AND THE SUN AND THE DISTANCE ARE THE QUIET THIRD. Equatorial sun over water, all day, with reflected UV from a pale sand bottom, on somebody concentrating on fishing, produces serious burn and heat illness faster than people expect, and the nearest definitive medical care may be a boat journey rather than a drive. Plan fluid, shade and covering before the day rather than during it, because the cost of getting this wrong here is not measured in discomfort.