Hydras

sponges - http://www.tolweb.org/treehouses/?treehouse_id=3431 hydras are not juz food for other organisms. some of them form symbiosis with green algae: http://www.biology-online.org/articles/abstract-effects_of_removing_symbiotic_green_algae_on_the_response_of_hydra_viridissima_pallas_1776_to_metals.htm

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For the organisms Sponges and Hydras, how do they benefit or affect the environment?? I really have no clue...the only thing I can think of is: - sponges helps to clean other marine organisms (??) - hydras can be food for other organisms. ...

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Kingdom: Animalia Phylum: Cnidaria Class: Hydrozoa In other words it is an animal. Some Examples of Hydrozoa are hydras and Portugese man-o-war. Examples of other Cnidarians are jellyfish, sean anemones, and corals.

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... I really like great white sharks because they are cool, wombats because they are so cute, gorillas, millipedes, octopus, squid, hydra. I like hydras because our class got to see them eat a 'water flea'. So cool. Horseshoe crabs too. Choosing is impossible! A lot of people I know think deer ...

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