CATDOLL : CATDOLL: Are octopuses and squids the same type of fish?

Are octopus and squid the same kind of fish?

no!

Also known as cuttlefish, cuttlefish, it is the most outstanding smokescreen expert among the cephalopods. It is a marine cephalopod mollusk of the order Sepioidea, closely related to octopuses and squids. It is characterized by a thick calcareous inner shell (sepia, cuttlebone or sea cucumber). There are about 100 species, with a body length of 2.5-6.590 cm (1.6-5.35 in), slightly flat, and narrow fleshy fins on both sides. It has 8 arms and two long tentacles for prey and can be retracted into two sacs; there are suckers on the tops of the arms and tentacles. It lives in shallow waters along tropical and temperate coasts and often migrates to deeper seas in winter. Common squids reproduce in spring and summer, laying about 100-65,300 eggs. Species of the genus Sepia mainly eat crustaceans, small fish or cannibalism. The main enemy is large aquatic animals. The meat is edible, the ink sac can be used to make ink, and the inner shell can be used to feed birds to supplement calcium. Modern squid appeared in the Miocene 21 million years ago, and its ancestors were belemnites. Commonly known as cuttlefish, it is caught in large quantities in fisheries, has delicious meat and is nutritious. It is a general term for animals of the family Sepia. It lives in warm oceans, swims fast, and mainly feeds on crustaceans, as well as fish and other mollusks. (Species include giant squid, calamari, golden squid (commonly known as squid), etc.) Common squids in my country include golden squid and needleless squid.

Octopus, also known as octopus, is a marine mollusk.

A general term for cephalopod molluscs of the order Octopoda. Strictly speaking, it refers only to animals of the genus Octopus, which are widely distributed in shallow water. Octopuses vary greatly in size. The smallest octopus is the arborescens, which is about 5 cm long(2), while the largest species can be up to 5.4 m(18) long, with an arm span of nearly 9 m(30). The typical octopus has a sac-like body; the head is not clearly demarcated from the body, with large compound eyes and eight retractable arms. Each arm has two rows of fleshy suckers that enable it to hold objects firmly. The base of the arm is connected to a webbed tissue called a skirt, with a mouth in the center. The mouth has a pair of sharp horny palates and a rasp-like radula, which it uses to drill into shells and scrape the flesh. The octopus draws water into its mantle and expel it through a short funnel-shaped body tube after breathing. Most octopuses use their suckers to crawl along the seafloor, but when frightened, they will eject water from their body tubes, thus quickly moving in the opposite direction. When in danger, they will eject ink-like substances as a smoke screen. Some species produce substances that can paralyze the sensory organs of attackers. The most well-known octopus is the common octopus (O. vulgaris), which is medium-sized and widely distributed in tropical and temperate waters around the world. It lives in caves or crevices on the rocky seabed and prefers to hide. It mainly feeds on crabs and other crustaceans. This species is considered to be the most intelligent among invertebrates, and has highly developed pigment-containing cells, so it can change its body color very quickly, and the speed of change is also amazing. Octopuses are dioecious. The male has a specialized arm, called the peduncle arm or copulatory arm, which is used to place the spermatophore directly into the female's mantle cavity. Common octopuses mate in winter. The eggs are about 0.3 cm (1/8) long, with a total of more than 100,000, and are laid under rocks or in caves. The larvae hatch after 4-6-58 weeks. During the incubation period, the female guards the eggs, cleans them with a sucker, and stirs them with water. The juvenile octopus is similar in shape to the adult but smaller. After hatching, it needs to drift with the plankton for several weeks before sinking to the bottom of the water to hide. Octopuses mainly feed on shrimps and crabs, but some species eat plankton. Many marine fish feed on octopuses. In the Mediterranean region, Oriental countries and some other parts of the world, people have long regarded octopuses as a delicacy.

Squids, although they are usually called fish, are not actually fish, but molluscs living in the ocean. In taxonomy, squids belong to the phylum Mollusca, class Cephalopoda, subclass Dibranchia, order Decapoda. Squids have two gills as respiratory organs; their bodies are divided into a head, a very short neck, and a trunk. There are a pair of well-developed eyes and arms around the mouth on both sides of the head. There are two types of squids currently seen in the market: one is a squid with a fatter trunk, which is called "squid"; the other is a squid with a slender trunk, which is called "soft fish", and the small soft fish is commonly called "small tube". Loliginidae (squid): A family of cephalopoda, commonly known as squid. Mainly distributed in tropical and temperate shallow seas, there are about 50 species. They often move in the middle and upper layers of shallow seas, and their vertical movement range can reach more than 100 meters. They feed on krill, sardines, silversides, small male fish, etc., and are themselves preyed by fierce fish. The eggs mature and are laid in batches. The eggs are wrapped in a gelatinous egg sheath. Each egg sheath contains a few to hundreds of eggs depending on the species. The number of eggs laid by different species varies greatly, ranging from hundreds to tens of thousands. Chinese squid (commonly known as "squid") has tender meat. Its dried product is called "dried squid". It has excellent meat quality and is well-known in the domestic and foreign seafood markets. It produces 40,000 to 50,000 tons annually. The main fishing grounds are in the southern Fujian, Taiwan, Guangdong and Guangxi coasts of China, as well as the Philippines, Vietnam and Thailand coasts.

Neither of them are fish, but are mollusks. Octopus has a round belly, also known as octopus; squid has a long belly.

Fish belong to the subphylum Vertebrata in the phylum Chordata, octopus belongs to the phylum Mollusca, class Cephalopod, order Octaplegia, and squid belongs to the phylum Mollusca, class Cephalopod, subclass Decapoda, order Tubula, order Sciuridae, suborder Osmoothia, so

Octopus and squid are not fish.

Neither of them are fish, but are mollusks. Octopus has a round belly, also known as octopus; squid has a long belly.

Octopus and squid are the same species of fish.

Which one of the following is fish: clam, swimming crab, octopus, or hairtail?

Only hairtail is a fish.

Hairtail belongs to the class of bony fish, order of Perciformes, family of Hairtail, in the subphylum of Vertebrata under the phylum Chordata. It is also called knife fish, skirt hairtail, fat hairtail, oil hairtail, tooth hairtail, etc. It is ferocious.

Octopus (scientific name: Octopus vulgaris) belongs to the order Octopoda of the class Cephalopoda of the phylum Mollusca, and is a general term for animals of the genus Octopoda of the family Octopidae. It is called "octopoda" because it has eight tentacles on its head, which are connected by membranes of different lengths, and have two rows of sessile suckers on its tentacles. It is a marine mollusk and not a fish.

The three-spotted swimming crab, scientific name Portunus trituberculatus, belongs to the Portunidae family and the genus Portunus. Common names include swimming crab, pistol crab, sea crab, sea crab, sea worm, water crab, door crab, small door crab, scorpion, cover fish, three-spot crab, child crab, flying crab, smoke cricket, and English name Swimming crab. It belongs to the crab family.

Flower clams (gé), a rare shellfish, are named for their smooth shell surface with beautiful red, brown, black and other color patterns.