1. Squid is not a fish. Squids, although it is customary to call them fish, are not actually fish, but molluscs that live in the ocean. The squid has two gills as respiratory organs. The body is divided into a head, a short neck and a trunk. There are a pair of well-developed eyes on both sides of the head and arms and legs surrounding the mouth. 2. Squid, also known as soft fish and calamari, has a conical body, pale color, with light brown spots, a large head, 10 tentacles in front, and triangular fins at the tail end. It often swims in groups at depths of about 20 meters in the ocean. 3. There are two types of squid currently seen in the market: one is a squid with a fatter trunk, and its name is "squid"; the other is a squid with a slender trunk, and its name is "soft fish". The common name of the small soft fish is "little tube boy".