在印度洋-太平洋地区，既有浅水礁区的鱿鱼，也有深水区的种类。作为头足类动物，它们拥有灵活的身体、触手

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 squid hunts using its prehensile tentacles, seizing its prey very quickly, then bringing it towards a powerful beak at the centre of its arms. They are often active at night and rise to the surface to feed. Depending on the size of the species and the individual, their diet varies greatly. The main predators of squid are cetaceans such as dolphins and, in particular, sperm whales, but also certain cod, seals and seabirds. Squid can escape their enemies by swimming rapidly and making sudden changes of direction. It is an animal at the heart of the oceanic food chain, acting as both predator and prey.