The difference between squid and octopus

Octopus is the general name of the genus octopus of the octopus family. It is a marine mollusk, not a fish. Squid generally refers to squid, shallow sea species, mainly living within the continental shelf, mostly active in the middle and lower layers during the day, often rise to the middle and upper layers at night, and move vertically from the surface to more than 100 meters. Let's take a look at the difference between squid and octopus.

Differences in families and genera between squid and octopus

1. Squid: squid belongs to animal kingdom, molluscs phylum, cephalopod, sheath subclass, squid order, squid family, squid molluscs.

2. Octopus: octopus belongs to the molluscs of the genus octopus, octopus.

The difference between squid and octopus

1. Squid: squid has a slender, cone-shaped body with more than a dozen tentacles, two of which are longer. There is a sucker at the front of the tentacle, and there is a horny tooth ring in the sucker. When preying on food, wrap it around with the tentacle and swallow it. Like to gather in groups, especially in the spring and summer mating and spawning period.

2. Octopus: the octopus body is short oval, saccular, fin-free, the boundary between head and body is not obvious, there are large compound eyes and 8 retractable wrists on the head, each wrist has two rows of fleshy suckers, usually crawl with wrists, sometimes swim through the telescopic membrane of the wrist, can hold other objects forcefully, and spray water from the funnel under the head for rapid retreating.

Differences in eating habits between squid and octopus

1. Squid: squid is a fierce carnivore. Most of its food is small pelagic species such as small males, sardines, scads and shrimps. It also preys on a large number of its kind. It is also an important prey for tuna, turtle, belt fish and seabirds.

2. Octopus: octopus feeds on branchial and crustaceans (shrimp, crab, etc.), and some species feed on plankton. The octopus sucks water into the outer membrane and expels it through a short funnel-shaped body tube after breathing. most of it crawls along the seafloor with a sucker, but when frightened, it ejects water from the body tube, which has a strong hydraulic force, which quickly moves in the opposite direction. ink-like substances are emitted when in danger, as smoke screens, some kinds of substances can paralyze the attackers' sensory organs.

Difference of producing area between squid and octopus

1. Squid: squid is distributed in tropical and temperate waters between latitude 40 °S and N. The main squid fishing grounds in the world are in the northern part of the South China Sea, the Gulf of Siam, Kyushu of Japan, the central Philippines, Western Europe and the eastern and western seas of the United States. Most of the fishing grounds are located around the islands and reefs, with slow water flow, high salinity, rough bottom, submarine grooves, coastal water system and warm current water system.

2. Octopus: octopus is widely distributed in tropical and temperate waters all over the world, and it is distributed along the north and south coasts of China. It lives underwater and adapts to a water temperature of no less than 7 ℃ and a specific gravity of 1.021 sea water. It will die in a low salinity environment. The sediment of the sea area had better be a gravel zone.