Squid, squid, cuttlefish are all biologically Squid (biological classification) class. Squid and cuttlefish are everyday names.
Octopus is a small family alongside squid.
Squid and octopus, which are animals of the same order (Cephalopoda), are similar, but have different body shapes, with the octopus being shorter and rounder. The number of feet is different, octopus is also called "octopus", squid is 10.
Octopus has eight claws
Squid has ten claws (squid has ten claws, is a kind of squid, that is, the gun squid.)
SQUID: Commonly known as cuttlefish and squid, squid is actually a mollusk that lives in the ocean, even though it is called a fish because it has no vertebrae. The enlarged part of the end of the rectum of the squid is called the ink sac, which is a container for the squid to dispense ink to strong enemies when it is in danger. The main ingredient of squid ink is squid ink melanin, which is a systemic hemostatic medicine and can be used for the treatment of gastrointestinal bleeding, functional uterine bleeding and pulmonary coughing up blood.
Octopus: Octopodidae (Octopus) 1 of the largest families of cephalopods - commonly known as octopuses. Octopus is another name for octopus.
Squid: mollusks, is a kind of squid, body conical, body color pale, with light brown spots, head is large, the front was born with tentacles 10, the tail end of the fleshy fins are triangular, often in groups cruising in the ocean at a depth of about 20 meters. The current market to see the squid have two kinds of squid: one is the trunk fat squid, its name is "gun squid"; one is the trunk slender squid, its name is "soft fish", small soft fish commonly known as "small tube child The first one is the "Pelican", which is a small squid with a long trunk.
We usually see the squid although there are several kinds, but are squid, not octopus.