SQUIDS!!!

In the group of invertebrates, there is a certain phylum called the molluska, which is one of the phyla we are learning about in class. This phylum contains squids, including the largest squid, and also the largest invertebrate, is the colossal squid, also called Mesonychoteuthis hamiltoni. They are 12 to 14 meters in length, and can weigh up to 750 Kilograms. They also have the largest known eyes of any animal, being around 30 to 40 centimeters in diameter. They eat large fish and other small squids with their beaks, which are the largest of any squid, but Antarctic toothfish are a large part of their diet. They only need to eat about 30 grams per day, and have hooks on their tentacles. Colossal squids are a large part of the sperm whales' diet, making up 77% of their consumed biomass. They live about 1000 meters deep in the antarctic area.

http://marinebio.org/species.asp?id=247
https://en.wikipedia.org/wiki/Colossal_squid