Detailed classification is as follows:
Squid:
By name squid, also known as flower branch, cuttlefish, cuttlefish. So: Squid is cuttlefish
Characteristics: has a thick calcareous inner shell (squid bone, cuttlefish bone or cuttlebone). There are about 350 species of squid, with body lengths ranging from 2.5 to 90 centimeters (1 to 35 inches), and the largest king squid is over 20 meters long. Squid distribution in the world's oceans, mainly living in tropical and temperate coastal shallow water.
The body of the squid is like a rubber bag, with the internal organs wrapped inside. On both sides of the body has fleshy fins, used to swim and keep the body balance. The head is short and has well-developed eyes on both sides. The top of the head has a long mouth with horny jaws that tear food. The feet of the squid are born on the top of the head, so it is also called cephalopods. Eight of the 10 feet on the top of the head are shorter and densely packed with suckers on the inside, called carpals; the other two longer, more mobile feet that can be retracted into two sacs are called tentacles, and only the front end of the inner side of the suckers. Squid mainly eat crustaceans, small fish or other mollusks
Squid:
Squid:
Mollusks are a kind of "squid", the body is conical, pale body color, with light brown spots, the head is large, in front of the birth of the tentacles 10, the tail end of the fleshy fins in a triangular shape, often swimming in groups in the ocean at a depth of about 20 meters. The current market to see the squid has 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 name of the squid is "Zojirushi".
Body features: squid body with two gills as a respiratory organ; the body is divided into the head, very short neck and trunk. Both sides of the head with a pair of developed eyes and around the mouth around the carpal feet.
Octopus
Characteristics: also known as the stone dwelling, octopus, sitting octopus, stone sucking, looking at the tide, dead cow, belongs to the mollusc phylum Cephalopoda octopods (Octopoda).
Body shape: The body is short ovoid, without fins. There are 8 wrists on the head, so it is also called "octopoda". The wrists are connected by a membrane, equal or unequal in length; the wrists have two rows of sessile suckers. Octopus head carcass about 7 ~ 9.5 cm. The carpal length of short octopus is about 12 centimeters, the carpal length of long octopus is about 48.5 centimeters, and the carpal length of true octopus is about 32.5 centimeters. Normally, it crawls with its wrists, sometimes swims by stretching the membrane between the wrists, or uses the funnel in the lower part of its head to spray water for rapid retreat. Most inhabited in shallow gravel or soft mud bottom and rocky reefs, carnivorous, to valve gills and crustaceans for food. Many marine fish feed on octopus. In late spring and early summer, like in the conch shells to spawn, so the rope can be threaded through the red conch shells sunk to the bottom of the sea, extracted and captured on time. Fall and winter often burrow in the deeper sea sediment.