ολυμπία μαργαρίτη εργασία φυσικής
8
Cnidaria Olympia Margariti St΄2
Transcript of ολυμπία μαργαρίτη εργασία φυσικής
CnidariaOlympia Margariti St΄2
Cnidaria - Κνιδόζωα Knidozoa (latin : Cnidaria) took their name from the ancient
greek word “Knidos” that means nettle, because of their ability to sting . In English they are called Cnidaria. Cnidaria are divided into five classes: a) Anthozoa , such as sea anemones , corals and sea feathers , b) Skyfozoa like jellyfish , c) Staurozoa like stalked jellyfish, d) Cubozoa, like cuboid jellyfish and e) hydrazoic , a group which includes cnidariaof freshwater .
Where do they live?
Most of the Cnidaria live in the sea. But there freshwater Cnidaria too, living in lakes and rivers. Many Cnidaria live at great depths .
What do they eat
Most Cnidarias feed on smaller organisms, such as plankton and sometimes with a little bigger.
Enemies
The enemies of Cnidarias are starfish , marine slugs , fish and turtles .
Special caracteristics The special features are: the radial symmetry.
All members are carnivorous and the tentacles bearing cnidarian cells
Thank you very much
Olympia Margariti
Sources Wikipedia Liquid Floor Team
