Saddled Seabream (Oblada) Bites on Spanish Beaches

HealthPlan Spain team · Reviewed by Sean Guy, authorised Sanitas agent · 11 min read · Updated November 2026

Every summer, bathers on Spanish beaches report small fish nipping at their legs, and the fish most often named on the Costa Blanca is the oblada, the saddled seabream. The bites draw blood and leave tooth marks, which is alarming in the water, but they are small wounds from a harmless fish. This guide explains what the saddled seabream is, why it bites people, where and when it happens, how to avoid it and what to do if you are bitten.

What is the saddled seabream?

The saddled seabream (Oblada melanura) is a sea bream of the Sparidae family. In Spanish and Catalan it is the oblada; along the Andalusian coast fishermen also call it dobla or doblada, and in English it is the saddled seabream, sometimes written saddled sea bream.

It is easy to recognise. The body is silvery grey, darker on the back, with dark lines running along the rows of scales. The giveaway is a large black mark shaped like a saddle on the narrow part of the body just before the tail, edged in white. The eyes are large for the size of the fish. Most adults are around 20 centimetres long. They can reach 30 centimetres, and the biggest on record measured 36.6 centimetres.

Saddled seabream live in shoals in open water over rocky bottoms and seagrass beds, usually in the top 30 metres of the sea. They are omnivores that feed mainly on small invertebrates, with some algae. They are found along the whole Mediterranean coast and in the eastern Atlantic from the Bay of Biscay and the Azores down to Angola, including Madeira and the Canary Islands. They spawn in spring, from April to June, and the young fish move into shallow water from late spring. According to the Andalusian fisheries catalogue, in winter the fish shelter near the bottom beside large boulders and overhangs and return to open water once the sea warms past 14 or 15 degrees.

The species is common, listed as Least Concern on the International Union for Conservation of Nature's Red List, and is fished and sold fresh in Spain, Sicily, Greece and Turkey, though in Andalusia it is mostly eaten by fishing communities and rarely reaches the market. FishBase, the reference database of fish species, lists its threat to humans as harmless.

What a saddled seabream bite is like

Each jaw carries a front row of eight to ten small, flat teeth, backed by rows of smaller teeth. A nip from a fish the size of your hand breaks the skin, draws a little blood and leaves tooth marks, most often on the lower legs, feet, arms or back. The wounds are small and not very painful; bathers say the fright of looking down and seeing blood in the water is the worst part.

The fish has no venom and carries no sting. Beach first-aid staff on the Costa Blanca treat the bites as minor wounds, and the local press reports that medical attention is rarely needed unless the bleeding is heavier than usual. A lifeguard in Benidorm gave one exception: a bite on a varicose vein may need a doctor, and a bather at Cala Galiota in Mallorca reported one in 2026 that was hard to stop bleeding.

The serious fish bites that make the headlines in Spain are a different story. A bather at Elche had a tendon partly cut by a bite in August 2019, and in July 2025 an elderly tourist at Playa de Palma in Mallorca was taken to a clinic after a deep bite on the calf. In Elche the lifeguards and police blamed a bluefish. In Mallorca the fish was never identified: the Balearic fisheries director, a marine biologist, thought a triggerfish most likely, and another marine expert suggested a bluefish. Neither case was put down to the oblada.

Heat, sun, bites and stings

Which summer problems sort themselves out, which need a doctor, and the two or three that are a 112 call.

Read the guide

Why do they bite swimmers?

No scientific study of the bites has been published that we can find, so the explanations below come from marine biologists quoted in the Spanish press. They agree on the main points.

They are used to people. Professor Alfonso Ramos of the University of Alicante describes the oblada as a fish that is used to being fed. Around Tabarca island, off Alicante, day-trippers feed the shoals in the harbour, and a dense population of fish that has learned to associate people with food does not swim away from a pair of legs.
Warm water makes them hungrier. In the summer of 2023 the University of Alicante's climatology laboratory measured the sea off Benidorm at 29 to 30 degrees. Professor Ramos and Ron Farage of the Palma Aquarium both say warmer water raises a fish's metabolism, so it needs more food and is less wary. They stress that this is an explanation, not a tested finding.
They go for anything that looks like food. The bites land on moles, warts, scabs, healing cuts and flaking skin. Speaking about the related sea breams that bite on Mallorca, Ron Farage explains that young sea breams act as cleaner fish, drawn to dead skin and scabs, and Joan Moranta of the Spanish Institute of Oceanography says they approach bathers because they pick up the smell of dead skin or a small wound. As the oceanographer Diego Ponce put it on Radio Ibiza, a fish does not tell the difference between a piece of bread, a biscuit crumb and a bather's toe.
The shoal gives them courage. A single fish is timid. When the shoal moves towards a group of bathers, each fish loses its fear. That fits what bathers report: several people nipped within minutes of each other.

Most bites happen in the first few metres of water, where people stand still, chat and paddle.

Where and when it happens

The Costa Blanca is where the oblada has been identified most clearly, because bitten bathers describe the black spot on the tail. Alicante's beach rescue and first-aid service first logged oblada bites in the summer of 2017, and the Institute of Coastal Ecology has followed the problem since. The best-known episode came in late August and early September 2023 at Benidorm's Poniente beach, when on some days more than 15 people went to the first-aid posts with bites. Benidorm saw the same the following summer, and in August 2025 bites from obladas and sargos were reported on the beaches of La Vila Joiosa, especially Varadero and Estudiantes near the fishing pier and Bol Nou.

The Balearic Islands have a longer history of biting fish. Bathers on Mallorca's east coast complained of bites and stings as far back as the summer of 2003. In July 2023 a lifeguard at Es Trenc, on the south coast, treated about 15 people in a single day, and minor bites have been reported somewhere around Mallorca every summer since: Playa de Palma, Sa Rapita, Cala Pi and Cala d'Or in 2025, Illetes and Cala Galiota in 2026, with cases on Menorca and Ibiza too. The experts consulted in the Balearics usually blame young sea breams of the Diplodus family, the sargos, rather than the oblada, so on Mallorca the biter may be a cousin. The behaviour and the advice are the same.

Biting fish are not a Spanish peculiarity. The Croatian Adriatic had a wave of nips in August 2024, with the same warm-water explanation. Reports run from late June to the end of September and cluster in July and August, when the sea is warmest and the beaches busiest.

How to avoid being bitten

Do not feed the fish. Bread thrown from a jetty or a boat teaches a shoal that people mean food. Benidorm town hall asks bathers not to feed the fish, and leaflets at the beach library explain that the fish mistake people for food.
Take off rings, bracelets and anything shiny. Reflections in the water attract other species, including the bluefish, the fish blamed for the serious bites at Elche in 2019 and Benidorm in 2015.
Cover scabs and healing cuts with a waterproof plaster before you go in, as the Benidorm lifeguards advise; a plaster over a prominent mole does no harm either. With an open wound, stay out of the sea altogether: warm seawater is not clean, and a wound that is already open is the one most likely to be nipped and to become infected.
Keep moving. The bites reported are almost all on people standing still in the first few metres of water. No lifeguard or biologist has published advice on this, but common sense says a bather who swims or walks on is a harder target than one standing in knee-deep water.
If fish start nipping, get out and tell the lifeguard. If several people are bitten, the lifeguards will know about it and can warn others.
Use beaches with a lifeguard service and respect the flags: green means free bathing, yellow means bathe with care, red means bathing is prohibited.

What to do if you are bitten

Get out of the water. That is the first step every source gives, and a bleeding wound is what the fish are after.
Stop the bleeding. Press on the wound with a clean cloth or towel until it stops.
Rinse it with clean water. Use tap water, bottled water or sterile saline. Do not rinse a wound with seawater: it is neither sterile nor a disinfectant.
Wash around it with soap, wiping away from the wound, then pat it dry with clean gauze or a clean cloth. No cotton wool and no alcohol.
Cover it with a plaster or a sterile dressing, and keep it clean and dry for a few days until the wound has closed.
Go to the lifeguard post if you want it looked at. Beach first-aid posts, the puestos de socorro, are a public service paid for by the town hall during the bathing season, staffed by trained lifeguards and first-aiders. No council is known to charge anyone, resident or visitor, for using them.

Call 112, or go straight to the nearest urgencias, if the bleeding will not stop with pressure, if the wound is deep, or if you take blood thinners and cannot stop the bleeding.

See a doctor the same day when:

the wound is longer than about five centimetres, or there is sand or dirt in it that you cannot rinse out;
the bite is on a hand, foot, face or head, which the NHS asks to have checked whatever their size;
in the days that follow, the wound becomes hot, swollen or more painful, turns red or darker than the skin around it, leaks fluid or smells, or you develop a fever or feel unwell: these are the signs of infection;
you take blood thinners such as warfarin, apixaban or rivaroxaban and the bite bleeds again later;
you have diabetes and the bite is on a foot or lower leg, where a small cut can turn into an ulcer, especially if you have lost some feeling in your feet;
the bite is on a varicose vein;
you cannot remember your last tetanus vaccination. Spain's health ministry counts bites among the wounds that can carry tetanus. Full protection takes five doses in a lifetime; if you have had fewer than five, or your last dose was more than ten years ago, ask a doctor whether you need a booster.

For children the first aid is the same. Paracetamol or ibuprofen are fine for a sore leg; children under 16 should not be given aspirin.

The pages on emergency numbers in Spain, jellyfish stings, rip currents and beach safety for families cover the other things that can spoil a day at a Spanish beach.

Should you worry?

No. A saddled seabream nip is a small wound from a harmless fish that has become too comfortable around people. Cover anything on your skin that looks like food, do not stand still in the shallows for long, and treat a bite as you would any small cut. The one thing not to do is ignore a wound that keeps bleeding or starts to look infected a day or two later, and that applies to any cut you take into the sea, not just a fish bite.

Sources

Photo: a saddled seabream off Cirkewwa, Malta, by Diego Delso, delso.photo, licence CC BY-SA 4.0, via Wikimedia Commons.

Frequently asked questions

Is the saddled seabream dangerous?

No. It has no venom and no sting, and a bite is a small nip that draws a little blood and leaves tooth marks. The serious fish bites reported in Spain, at Elche in 2019 and Playa de Palma in 2025, were put down to larger fish, probably a bluefish or a triggerfish, not to the oblada.

Why do the fish bite moles, scabs and cuts?

Young sea breams act as cleaner fish and are drawn to dead skin, scabs and the smell of a small wound. A shoal that is used to being fed by people does not swim away from bathers, so anything on your skin that looks like food gets investigated. Cover scabs and healing cuts with a waterproof plaster, and do not stand still in the shallows for long.

Which beaches in Spain have biting fish?

On the Costa Blanca, Alicante's beach first-aid service has logged oblada bites since 2017. The best-known episode was at Benidorm's Poniente beach in late August and early September 2023, and bites were reported at La Vila Joiosa in August 2025. Mallorca has reported nips every summer since 2023, with cases on Menorca and Ibiza as well, usually blamed on young sea breams of the sargo group rather than the oblada. Biting sea breams are reported on other Mediterranean coasts too, including the Croatian Adriatic in 2024, and the reports cluster between late June and September.

What should I do after a fish bite?

Get out of the water, press on the wound with a clean cloth until the bleeding stops, rinse it with tap or bottled water rather than seawater, wash around it with soap, dry it and cover it. The beach first-aid post, a council-run service, will look at it for you. Call 112 or go to urgencias if the bleeding will not stop or the wound is deep. See a doctor the same day if the wound shows signs of infection in the days that follow, if you take blood thinners and it bleeds again, if you have diabetes and the bite is on a foot or lower leg, or if you are not sure you are up to date with tetanus vaccination.

Can I swim with a cut or a plaster?

A superficial graze or a healing cut under a waterproof plaster is fine. With an open wound, stay out of the sea: warm seawater is not clean, and an open wound is exactly what a biting fish goes for.

Saddled Seabream Bites in Spain: Why the Oblada Nips Swimmers and What To Do