CATDOLL : CATDOLL: What are the types and representative species of fish scales?

1. What are the types and representative species of fish scales?

There are four basic types of fish scales. Most bony fish have bony scales that overlap and are arranged in a shingled pattern just below the epidermis. Sharks have scutes, tooth-like structures embedded in the skin that create a sandpaper-like surface. Coelacanths have four layers of tooth scales, while long-snouted scleractinians have diamond-shaped scales. Some fish, such as catfish, have no scales at all.

2. What are the types of fish scales?

There are four basic types of scales in fish. Most bony fish have bony scales that overlap and are arranged in a shingled pattern just below the epidermis.

Sharks have scutes, which are tooth-like structures embedded in the skin. Spinosaurs have four layers of denticles and long-nosed sclerites have diamond-shaped sclerites. Some fish, like catfish, have no scales at all. There are three main types of fish: bony, cartilaginous, and palatine.

3. Fish without scales?

There are many fish without scales, such as stingrays, catfish, eels, loaches, eels, yellow catfish, silverfish, etc. For fish, scales are a derivative of the skin, the main component of which is calcium. Its function is to protect the fish body from mechanical damage. At the same time, the special structure also helps it swim and can reduce the resistance it encounters. Fish without scales often have a higher cholesterol content.

4. How many types of fish scales are there?

There are four basic types of fish scales. Most bony fish have bony scales that overlap and are arranged in a shingled pattern just below the epidermis. Sharks have scutes, tooth-like structures embedded in the skin that create a sandpaper-like surface. Coelacanths have four layers of tooth scales, while long-snouted scleractinians have diamond-shaped scales. Some fish, such as catfish, have no scales at all.

5. Types of marine fish?

1. Sharks live in the ocean and are fish in the ocean. Sharks have existed on Earth 300 million years before the appearance of dinosaurs, which means they have existed for more than 500 million years. They have hardly changed in the past 100 million years.

2. Hairtail, belonging to the class of bony fishes, order of Perciformes, family of Hairtails, in the subphylum of Vertebrata under the phylum Chordata. It is mainly distributed in the western Pacific Ocean and the Indian Ocean, and in the Yellow Sea, East China Sea, Bohai Sea and even the South China Sea in China. It is known as one of the four major seafoods in China along with large yellow croaker, small yellow croaker and squid.

3. Grouper, inhabits coastal reefs, undulating and pebbly sea areas, coral reefs, shipwrecks or artificial reefs. Grouper is a typical predatory carnivorous fish. It relies on its sensitive vision and light and color perception ability to ferociously prey on fish, shrimp, crab, octopus, and even barnacles and other marine life. It especially likes to eat fresh animals. It is an endangered and precious species.

4. Cuttlefish, also known as squid, cuttlefish, eyefish, etc. It belongs to the phylum Mollusca, class Cephalopoda, order Decapoda, family Sepiidae. The "cuttlefish" or "squid" referred to in China mostly refers to the two species of Mansoni's needleless squid and golden squid, which are mainly produced in the East China Sea.

5. Flatfish are particularly suitable for bottom-dwelling life on the seabed. Because of their flat bodies, both eyes are on the side of the body facing upwards, and the color of this side matches the surrounding environment well; the side facing downwards is white. Flatfish have very fine scales on their body surface. Flatfish have only one dorsal fin, which extends almost from the head to the tail fin.

6. What are the types of scales of butterfly carp?

Scale type: a white one. Butterfly carp is an ornamental fish with a tail fin that looks like a butterfly. It is loved by fish lovers because of its white body and good appearance. German butterfly carp looks good with full scales on its body.

7. Types of small-scale fish?

The most typical small-scale fish is bighead carp.

Bighead carp is a fish of the Cyprinidae family and the genus Bighead. The body is elongated and laterally flattened, with the abdominal fleshy ridge starting from the base of the pelvic fin to the front of the anus. The head is large and rounded. The snout is broad and blunt. The eyes are located below the central axis of the head. The mouth is terminal, the mouth fissure is tilted upward, and the lower jaw is slightly protruding. The gill rakers are narrow, long, fine, but not connected, and there are more than 400 of them. The body is covered with small round scales; the lateral line is complete, with 91 to 108 lateral line scales. All fins have no hard spines, the dorsal fin has 3 soft rays (unbranched soft rays) + 7 (branched soft rays); the anal fin has 3 (unbranched soft rays) + 12 to 13 (branched soft rays), and the pelvic fin has 1 (unbranched soft rays) + 8 (branched soft rays). There is only one row of pharyngeal teeth, with 4 to 4 teeth, flat, and the tooth surface is wide and has fine granular protrusions. The dorsal side of the body is gray-black with a slight golden luster, and the ventral side is silvery white; there are many irregular black spots on the sides of the body. Each fin is grayish white with many tiny black spots.

8. What are the fish species in the Democratic Republic of Congo?

There are many species of Congo goldfish, which are tropical freshwater fish distributed in the Fwa Lake basin in the Democratic Republic of Congo in Africa. They can reach a body length of 3.9 cm and live in the bottom and middle layers of water. Their living habits are unknown.

The Congo River Basin has the wettest and hottest climate in Africa, and the most extensive and densest equatorial rainforest. The Congo River has a continuous supply of rainwater all year round, and the flow is balanced, so there are many types of goldfish.

9. What is the reason for the prosperity of fish species?

“The sea is wide enough for fish to leap, and the sky is high enough for birds to fly.” The sky is the territory of birds, and the water is the world of fish. Why can fish dominate and thrive in the vast ocean and lakes? Because nature has endowed them with the ability to live in water.

Due to the influence of various environmental conditions in the water, fish have various appearances. But the fish that live the best and have the largest number have a spindle-shaped body. The streamlined spindle shape can greatly reduce the resistance when swimming in the water. The surface of a good body shape often has a layer of slippery liquid, which is the mucus secreted by the fish skin. This mucus is evenly applied to the fish scales, making the streamlined surface like a lubricant, reducing the friction between the fish body and the water during movement. There are multiple fins on the trunk of the fish, which are the fish's movement organs. There are paired pectoral fins and pelvic fins, as well as unpaired dorsal fins, anal fins and caudal fins. These fins are combined with muscle contraction and keep paddling, just like a propeller installed on the fish body, pushing the fish body forward continuously. Each fin has a division of labor. The pectoral fins and pelvic fins are responsible for the balance of the fish body and changing the direction of movement, while the caudal fin, anal fin and dorsal fin control the direction of movement and prevent the fish body from swaying left and right. The underwater world is not a peaceful world. Sometimes there are strong winds and surging waves; sometimes the temperature rises and falls, and the temperature is uncertain; sometimes there are "sneak attacks" and "robberies" from other species. Fish have their own instincts to deal with these. There is a special sensory organ on both sides of the fish's body. The sensory organ communicates with the outside world through the small holes on the scales. Many small holes on the scales are distributed along the sensory organ on both sides of the fish's body, arranged in a line. This line composed of the arrangement of scale holes is called the lateral line. Through this lateral line, fish can feel the direction of the water flow, the fluctuation of the water, the high and low water temperature and the sound waves in the water. Once the wind blows and the "water" moves, the lateral line immediately notifies the fish body, and the fish immediately prepares for emergencies.

Nature has given fish "18 martial arts", so it is no wonder that fish can be found in almost all waters around the world and grow and expand their ranks, making fish the largest family among vertebrates.

10. What are the types of fish in the Caspian Sea?

The Caspian Sea is extremely rich in fishery resources, with the Russian sturgeon, the white sturgeon, the Persian sturgeon, the European sturgeon, the Caspian salmon, the Caspian herring and other fish of the greatest economic value. There are six species of sturgeon in the Caspian Sea, including the Russian sturgeon, the naked belly sturgeon, the Persian sturgeon, the small sterlet sturgeon, the white sturgeon and the European sturgeon, and the eggs of these fish can be processed into delicious sturgeon caviar.