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. When squid encounters a strong enemy, it will use "inkjet" as a means of escape and wait for an opportunity to leave, so there are names such as "squid" and "cuttlefish". There are pigmented vesicles in its skin, which will change color and size with the change of "mood". 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 the animal kingdom, mollusk phylum, cephalopod, new octopus subclass, squid order, squid suborder, squid family, squid mollusk.

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

The difference between cuttlefish and octopus

1. Squid: squid feet have been specialized into wrists and funnels, 10 wrists are arranged symmetrically, the back is the first pair, and the ventral side is 2-5 pairs, of which the fourth pair of wrists is particularly long, the end is enlarged in the shape of a tongue, the front of the body is spherical, and its top is a mouth, a total of 10 wrists, 8 short wrists, and two long tentacular wrists for capture and consumption, surrounded by oral membranes, called tentacles, which can prey and shrink into the wrist sac.

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 feeding habits between squid and octopus

1. Squid: squid mainly eats crustaceans, small fish or other molluscs, and the main enemies are large aquatic animals. The ink in the body is usually stored in the ink sac in the belly. When the enemy attacks, a stream of ink will be ejected from the ink sac, dye the surrounding sea water black, and then take the opportunity to escape.

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.

The difference in IQ between squid and octopus

1. Squid: the nervous system of squid is well developed, which is composed of central nervous system, peripheral nervous system and sympathetic nervous system.

2. Octopus: octopus has "conceptual thinking" and can solve complex problems on its own. It is this ability that makes it have the ability to walk on two feet and has a well-developed brain to distinguish itself in the mirror.