What are 5 What are facts about starfish?

Answer 1

Sea stars, also known as starfish, are echinoderms belonging to the class Asteroidea.

Interesting Facts about Starfish:

Starfish are also known as sea stars and are not really fish despite the name been given to them. These are echinoderms, which are found abundant in the deep blue seas and shallow waters as well.

The characteristic feature of the starfish is the 5 (or even more) arms. The surface of these arms is often spiky in appearance.

If you have ever encountered a starfish and turned it over, you will find projections on the underside. These are known as tube feet, which serve two basic functions - one being able to move around the ocean floor and the other to open up a scallop or clam.

An interesting fact about the starfish is that it has two stomachs. The cardiac stomach can help the starfish to engulf food outside its body. When the cardiac stomach comes back into the body, the food in it is transferred to the pyloric stomach.

The tube feet play an important role in helping the starfish to procure its food. The tube feet are used to open up the oysters or clams. Then the stomach is extended into the shell to pull the food inside.

Have you ever tried locating the mouth of a starfish? It is located on the ventral surface, underneath the upper surface.

The total number of species of the starfish is a mind-boggling number of around 1800! This would represent only the various kinds of starfish have been discovered till date.

Starfish are found in all the oceans around the world. A large variety of the same is seen in the tropical area of the Indo-Pacific. These also live in the coral reefs and seabeds that are really at great depths. Starfish are never found in fresh water.

The Coscinasterias Calamaria also known as the eleven-armed sea star has an armspread that can go up to 30 cm. As the name suggests, it does have eleven arms but there are times when the number can go up to 14.

The starfish have microscopic eyes at the end of each arm; this enables the starfish to view movement and differentiate between light and dark.

Most starfish have a spiky surface as a means of protection. The crown-of-thorns starfish is known for its thorny spines that are present all over the body.

The patterns seen in a starfish are many. Bright colors and stripes occur often in case of starfish.

In case a starfish loses its arm, it is capable of regenerating the same!they live for a while

The live up to 98 years old.

They eat oysters and clams.

Answer 2

There are more than 2000 types of starfish in the world. Starfish do not have blood and can regenerate an arm if they lose one. Many times, a starfish will just drop one of its arms to protect itself.

Answer 3

Starfish are among the most familiar of marine animals found on the seabed. They typically have a central disc and five arms, though some species have many more arms than this. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey, brown, or drab. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. They are opportunistic feeders and are mostly predators on benthic invertebrates. Several species having specialized feeding behaviors, including suspension feeding and adaptations for feeding on specific prey. They have complex life cycles and can reproduce both sexually and asexually. Most can regenerate damaged or lost arms.

Answer 4

1. When they lose a leg they grow back again.

2. Starfish have 2 stomachs. The cardiac stomach can help the starfish to engulf food outside it's body.

3. Starfish don't have a brain.

Answer 5

There are over 2000 species of sea stars. They are usually about 5-10 inches in width. Sea stars are not fish. They are echinoderms. Not all sea stars have 5 arms.

Answer 6

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