The term SEA ANIMAL can be broken down into two crossword solutions: SPONGE (6 letters) and ORC (3 letters). Sponges are a type of aquatic animal that lack true organs and have porous bodies. They are filter feeders, meaning they feed on small particles in the water. Orcas, also known as killer whales, are the largest species of the dolphin family. They are highly intelligent and social animals, living in pods and hunting cooperatively.