Write about the appearance of starfish characteristics, the characteristics of starfish are briefly

Much like a pentagram, starfish feed on crustaceans. When the starfish wants to eat the mussels, they first open the shells with a powerful suction cup, and then stick their stomachs out of their mouths to eat the mussels' bodies, and the starfish's five limbs are covered with dense legs. Starfish is a class of the phylum Echinoderms, which are divided into two families, petrel and seapancar, but people are commonly known as starfish or "starfish with hollow wrists, covered with short spines and forked spines; The groove below has rows of tube feet (some with suction cups at the end) that allow the starfish to crawl in any direction, even up steep faces.

The lower starfish feed on food grains that enter the mouth along the carpal groove.

Starfish are characterized by non-fish, no brainless blood, regenerative body, and a special digestive system. 1. Non-fishes: Starfish are not real fish, they have no gills, fins or scales, and they belong to the cryptoechinoderms.

2. Brainless blood: Ignite seawater as a substitute for blood for them to survive, and be sustained by a special "hydrovascular system" in the body. 3. The body is renewable

Their arms, when there is a void, can even regenerate their entire body. <

Starfish are characterized by non-fish, no brainless blood, regenerative body, and a special digestive system.

1. Non-fish: Starfish are not really fish, they have no gills, fins or scales and belong to echinoderms.

2. Anencephalic blood: seawater is used as a substitute for blood for them to survive, and life is maintained by a special "hydrovascular system" in the body.

3. Body regeneration: the regeneration of their arms, and sometimes even the entire body.

4. Digestive system: Starfish have two stomachs, one for digestion and the other to expand itself and engulf prey.

However, there are also asymmetrical or round-like morphologies. 2.Body structure is unique to Peter:

The interior of the starfish's body is relatively simple, supported by a system of channels and body structures, and the nervous system is responsible for transmitting signals. There is no presence of the head or the different organs that differentiate Liang Xiangxiang. 3.

Variety: Different species of starfish have different shapes, colors, and spots. The surface of the starfish is covered with many hard plate-like bone fragments, usually pentagonal in shape.

4.Can regenerate more quickly: many starfish are able to regrow after losing certain structures, which is relatively rare in the marine animal kingdom.

1. Bright color. Starfish vary in size, from 2.5 centimeters to 90 centimeters, and their body color is also different, almost all of them are different, and the most common colors are orange, red, purple, yellow, and cyan.

2. Strong reproductive ability. Starfish are echinoderms that live in the sea, they have a strong reproductive ability and can live up to 35 years. There are about 1,500 species of starfish in the world, and most of them are bred through in vitro fertilization and do not require mating.

3. Strong regeneration ability. A starfish can grow a new starfish with just one stump arm. Starfish's wrists and body discs are damaged or self-cut, and they can regenerate naturally. Any part of the starfish can regenerate a new starfish.

1. Starfish, sea cucumbers, sea urchins, etc. are the same echinoderms. They usually have five wrists, but there are also four or six, flattened, mostly star-shaped. The whole body is made up of many calcareous bone plates bonded by connective tissue, and there are prominent appendages such as spines, tumors, or warts.

Some have as many as 50 wrists, and on the underside of these wrists there are 4 rows of dense tube feet. With a tube foot, you can not only catch prey, but also allow yourself to climb the rocky reef, and the large starfish have thousands of tube legs.

2. The vast majority of starfish are dioecious, with a total of 10 gonads, each of which is composed of a clump of grape-like tubes. In the immature stage, the glands are small and located at the base of the five wrists. During the reproductive period, the glands are large and fill almost the entire wrist.

The gonads are often white in males and orange in females, and each gonad has a genital pore located on the base of the postordial wrist **disk. Acer starfish (astropectinidae) have many gonads on each wrist, arranged in rows, and the genital orifice opens on the surface of the mouth.

The diameter of the body of starfish is 12-24 cm, but the size varies greatly from species to species, and the range of diameter varies between 1 and 80 cm.

The body surface is yellowish-brown, but some species have bright red, orange, blue, purple and other colors, or a mixture of several colors. The body is in the shape of a five-star, such as a sea disc car, with five wrists extending outward from the ** disk.

The sun starfish can have up to 40 wrists. Most species have a wider wrist near the ** plate, tapering at the end, and a few are similar. The length of the wrist is generally 1-3 times the diameter of the ** disk, but some wrists are up to 4-5 times.

Some species have very short wrists and are wide enough to give the body a pentagonal shape, such as a bread starfish. The central area from the wrist to the ** disc is called the step belt area, also known as the radiation area.