在印度洋-太平洋地区，既有浅水礁区的乌贼，也有深水区的种类。作为头足类动物，它们身体柔软，有触手，并

re carnivorous predators, but they themselves have many enemies in the sea.Their diet consists mainly of small fish, shrimps and other crustaceans, marine worms,and sometimes small squid. Juveniles eat more plankton and small prey. The squidhunts using its prehensile tentacles, seizing its prey very quickly, then bringing ittowards a powerful beak at the centre of its arms. They are often active at night and riseto the surface to feed. Depending on the size of the species and the individual, their dietvaries greatly. The main predators of squid are cetaceans such as dolphins and, inparticular, sperm whales, but also certain cod, seals and seabirds. Squid can escape theirenemies by swimming rapidly and making sudden changes of direction. It is an animalat the heart of the oceanic food chain, acting as both predator and prey.