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Static Wikipedia: Italiano -Inglese (ridotta) - Francese - Spagnolo - Tedesco - Portoghese
 
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101 free audiobooks - Stampa Alternativa - The Open DVD - Open Bach Project  - Libretti d'opera - Audiobook PG

Jellyfish

From Wikipedia, a free encyclopedia written in simple English for easy reading.

A Jellyfish
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A Jellyfish

Jellyfish are water-living animals. Their bodies consist of 99% water and they have got no bones or inner organs. A jellyfish has got a bell-shaped body and long tentacles at the underside of the body. (Tentacles are long "arms" with special stinging cells.) They move by contracting moves of their bell, but they cannot decide where to go on their own. Most time they drift with the water current.

This is why they assemble in swarms. They reproduce without mating by creating polyps, which do not look like jellyfish and are fixed to the ground. When they turned to 10-15 small jellyfish, they die.

Jellyfish eat plankton and little fish, which are caught by their poisoned tentacles.

Some jellyfish live in symbiosis with algae. The jellyfish transport them into sunlight and get the nutrients (of their photosynthesis) from them.

See also Medusa (animal)