Starfish are strange and beautiful creatures in the ocean. They come in a variety of colors and look like stars in animation. The most common starfish has five arms, but some species can grow up to 40 arms.

In fact, this amazing sea creature belongs to the echinoderms. They move through tubular feet, can regenerate after losing their arms, and can swallow food larger than themselves. Here are some fun facts about this amazing creature.

1.Starfish are not fish

Although starfish live underwater and are there is "fish" in their name, they are not actually fish. They do not have gills, scales, or fins like fish. Sea stars also move very differently from fish. While fish use their tails to propel forward, starfish have tiny tubular feet to help them move forward.

2. Starfish are echinoderms

Starfish belong to the phylum Echinoderm. This means they belong to the same family as sea urchins, sea cucumbers and other animals. In total, this phylum contains about 7000 species. A number of echinoderms exhibit radial symmetry, meaning their body parts are arranged around a central axis. Therefore, many starfish have five-point radial symmetry because their bodies have five parts. This means they have no distinct left and right halves, just top and bottom sides. Echinoderms also usually have spines, which are less pronounced in starfish than in sea urchins.

3. There are about 2000 species of starfish in the world

There are about 2,000 species of starfish worldwide. Some live in the intertidal zone, while others live in the deep waters of the ocean. Most of these live in the tropics, but starfish can be found in cold regions and even in the polar regions.

4.Starfish can regrow their arms

Surprisingly, starfish can regrow their lost arms, which is useful for starfish when they dodge predators. Most of the starfish's vital organs are on the arms. This means that some starfish can regrow a new starfish with one arm. But the process is slow, and it takes about a year for an arm to regrow.

5.Starfish have no blood

Starfish have no blood, their circulatory system consists mainly of seawater. Seawater is pumped into the animal's water vascular system through the sieve plate. This is a type of trapdoor, called a sieve, and a light-colored blob can usually be seen on the top of a starfish. Seawater enters the starfish's legs, causing the arms to stretch. The muscles in the podia are used to control the contraction of the limb.

6. Starfish move with tube feet

Sea stars move using hundreds of tube feet located on their undersides. The legs are filled with seawater, which the starfish brings in through the sieve plate on top of it. Starfish are moving faster than you might think. If you have the chance, take a trip to the seaside or the aquarium and take a moment to observe the movement of a starfish, one of the most stunning sights in the ocean. Tube feet also help starfish grab prey, including clams and mussels.

7. What do starfish eat?

Starfish feed on bivalves like mussels and clams as well as small fish, snails and barnacles. Starfish have a unique way of prying open shellfish. The starfish's mouth is under it. When it grabs food, the starfish wraps its arms around the animal's shell and gently pulls it apart. The next steps will be surprising - the starfish pushes its stomach out of its mouth into the bivalve shell. It then digests the animal and slides its stomach back into its own body. This unique feeding mechanism allows the starfish to eat larger prey than it could otherwise fit into its small mouth.