Although they are customarily referred to as fish, the squid is actually not a fish but a mollusc that lives in the ocean. The body is long and slender, with a suction cup at the front. There are two pieces of eel in the eel body as respiratory organs; the body is divided into the head, a very short neck and trunk. The body is long and slender with two long ones. In terms of taxonomy, carp belongs to the molluscs - cephalopods - diploids - ten wrist animals. Both sides of the head have a pair of well-developed eyes and brachiopods around the mouth.