Why Hundreds of Sharks Are Gathering Near the Coast

At dawn, the first walkers thought they saw a dark sheet moving just beyond the break of the waves. Then fins broke the surface: one, ten, then dozens, only a few hundred metres from a beach they knew well. Phones were raised, children came out of the sea without needing to be asked twice, and lifeguards watched with the calm caution that always contrasts with panic on social media. What is striking is the scale: several hundred sharks have been spotted near certain coastal areas, sometimes within just a few days. There is no frantic hunt and no obvious aggressive behaviour. Simply an unusual, almost silent presence-and one question being asked everywhere.

A large shark gathering that does not resemble an attack

From the shore, even one group of sharks can turn a calm sea into something that looks like a film set. Yet specialists stress one key point: coastal gatherings of this kind do not automatically mean swimmers are at risk. The animals may be following shoals of small fish, taking advantage of warmer water, or using a migration route that runs close to shore. Their presence is spectacular, but it does not necessarily tell a story of danger. Sharks conserve energy, look for food and respond to environmental conditions, like all large marine predators.

Along several stretches of coastline, aerial surveys and drones have already identified groups of more than a hundred individuals. In most documented cases, sharks swim parallel to the beach while focusing on shoals of anchovies, sardines or mullet. Swimmers may be only a few dozen metres away, often unaware of what is happening beneath them. That proximity explains the unease: we all know the feeling of discovering, too late, that nature was there before us. However, videos generally show no pursuit aimed at people.

Water temperature can alter the situation within days. A coastal current, an upwelling of nutrient-rich water or the sudden arrival of large numbers of forage fish can create a moving food source, which sharks then follow. Some species also come close to shore to give birth or to allow their young to grow in areas less exposed to larger predators. This is not a siege of the coastline; it is often a highly specific biological event. The difficulty is that these natural phenomena now unfold under the constant gaze of smartphones.

If a shark is seen close to shore, the right response is straightforward

When an alert is issued, the most useful action is to leave the water calmly and follow the lifeguards’ instructions. There is no need to run while splashing around, or to stop and inspect a video recorded by someone nearby: return to the beach, keep children close and let the teams monitor the area. Flags, loudspeakers and local apps are there precisely to prevent improvised decisions. A temporary swimming ban is not an overreaction; it is a sensible safety and comfort measure while the situation is assessed.

The most common mistake is also the most human one: wanting to get closer for a better look. A shark near the shoreline naturally attracts curiosity, especially if it appears calm, but a wild animal can suddenly change direction if it is startled, trapped or fed. Let us be honest: keeping calm when a fin is visible in the water is not something anyone really does every day. Avoid swimming at dawn or dusk in an area where sharks have been reported, remove shiny jewellery, and do not swim among a shoal of fish leaping at the surface.

Biologists point out that risks can be greatly reduced simply by reading the signs around you: murky water, tightly grouped fish, diving birds, fishing activity or a local authority warning. Being careful does not stop you enjoying the sea. Above all, it helps prevent fascination from becoming recklessness.

“A shark seen near the coast is not a shark looking for a human: first and foremost, it is responding to what the ocean is offering that day.”

• Leave the water without sudden movements if an alert is raised;
• Respect temporary closures, even when the sea appears calm;
• Never try to film, feed or follow the animal from the water;
• Notify lifeguards if you spot anything unusual.

What these sharks also reveal about our coastline

Seeing hundreds of sharks near the coast is unsettling because it challenges a deeply rooted assumption: that the sea is a perfectly controlled leisure space. Beneath the surface, however, beaches remain living ecosystems, crossed by migrations, births, hunts and temperature shifts that we barely notice. More frequent sightings may reflect improved monitoring, particularly through drones, but they may also point to deeper changes in species distribution. The sea is not suddenly becoming hostile: it is simply revealing itself more clearly.

Their presence can even offer an opportunity to understand sharks better, as they are so often reduced in the popular imagination to a threatening outline. They play a major part in marine balance by regulating certain populations and removing the weakest individuals. Rather than trying to drive them away at any cost, specialists aim to anticipate their movements in order to arrange realistic coexistence. Protective nets, patrols, tracking tags and real-time alerts are all improving. They do not eliminate the unknown, but they stop it from being left to rumour.

The next time a video shows fins near a beach, fear will probably be the first reaction. That is understandable. Yet viewing the scene with a little more perspective changes everything: these sharks have not necessarily come “towards us”; they may simply be following a route that existed long before the buildings, parasols and car parks. Sharing verified information, observing a local restriction and explaining the phenomenon to younger people may be enough to calm the atmosphere. The question remains: are we ready to accept that the shoreline never entirely belongs to us?