What does starfish eat


The common starfish from the North Sea is usually 8-20 cm tall, it can reach up to 50 cm. Starfish are often brightly colored, blue, reddish, red or yellow. Dried dead starfish look yellow. Common starfish, like most starfish, usually have 5 arms.

Starfish live in the Atlantic, the North Sea and the Baltic Sea. They are common on the North Sea, as beach hikers on the Baltic Sea you can usually find starfish in the winter months, but they are rare in the Bay of L├╝beck and Mecklenburg. Fishermen often have starfish in their nets as bycatch.

The starfish belongs to the echinoderm tribe. Its relatives are the sea urchins, brittle stars, hair stars and sea rollers (these elongated animals are often called "sea cucumbers").

It feeds on mussels, snails, sea urchins, hermit crabs and crabs. If fish are caught in nets, he can eat them too. The starfish especially likes to eat mussels. He opens it with the help of his arms. To do this, he holds onto the two shell halves of the mussel with many small suction feet (they look like small pistils on thin stems) and pulls very hard. After a few minutes or hours, the mussel can no longer keep its shells closed and slowly opens. Then the starfish puts its stomach over the opening and begins to digest the mussel. In the end, the empty conch shell is left over. The mouth opening, from which the stomach is everted, is in the middle of the body on the underside.

Starfish can follow their prey and also find them over a distance. However, you cannot quickly go to the prey. They come about 6 cm per minute, mainly walking with the many small suction feet that sit on the underside of the body.

The starfish's enemies are seagulls, diving ducks and crabs.

The starfish produce many millions of eggs (2-100 million) in spring or summer and eject them within a few hours. From this a small swimming larva develops and after a few weeks another larva and then the young starfish develop from it.


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Last update of this page: August 20, 2015

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