Shark ocean menacing

The shark, with its menacing silhouette, is far more than a predator: it's a vital link in marine ecosystems.

About this subject

Sharks are cartilaginous fish that have inhabited the oceans for over 400 million years, even predating the dinosaurs. There are more than 500 known species, ranging from the tiny dwarf lanternshark (only 20 cm) to the enormous whale shark (up to 12 meters), the largest fish in the world. Despite a reputation as 'killing machines' propagated by the film Jaws (1975), most species are harmless to humans. Attacks are rare and usually result from mistaken identity.

Sharks play a crucial role as top predators, controlling prey populations and maintaining the balance of marine ecosystems. Their absence can lead to coral reef degradation and loss of biodiversity. Unfortunately, overfishing for fins (shark finning) threatens about one-third of shark species, now listed on the IUCN Red List.

These animals possess extraordinary senses: ampullae of Lorenzini detect electric fields, the lateral line perceives vibrations, and a keen sense of smell can identify a drop of blood from kilometers away. Some sharks, like the great white, can leap out of the water during attacks on prey, a behavior known as breaching.

Frequently Asked Questions

Do sharks frequently attack humans?

No. Shark attacks are extremely rare, with about 70 to 100 unprovoked incidents worldwide each year, and only a fraction are fatal. Most encounters occur out of curiosity or mistaken identity.

How many shark species are there?

Currently, over 500 shark species are known, varying in size, habitat, and behavior. New species continue to be discovered regularly.

Why are sharks important for the ocean?

As top predators, sharks regulate prey populations, ensuring the health of marine ecosystems. Their removal can cause ecological imbalances, such as the collapse of coral reefs.