Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (http://www.tropicalfishkeeping.com/)
-   Tropical Fish Diseases (http://www.tropicalfishkeeping.com/tropical-fish-diseases/)
-   -   Small white things growing in tank (http://www.tropicalfishkeeping.com/tropical-fish-diseases/small-white-things-growing-tank-13089/)

sniperjoe2 03-20-2008 04:21 AM

Small white things growing in tank
 
I have some small white things in my tank. The only way I can really explain it is a small white almost tree looking thing growing on the rock. it has a thicker stump and about 6 arms protruding out from the end of the stump. The one rock has them all over it, is this a danger to my fish? any help would be greatly appreciated.

Dtld9 03-20-2008 10:51 AM

Is this it?
http://sademetsa.net/hydra_viridissima.jpg

If so it's hydra, here's a description taken from another forum, credir goes to them.

Hydra are beautiful, but a wee bit annoying creatures. They spend their life attached to surfaces (plants, glass, filter, decoration), they can move a bit, but usually don't have the need to do that. If disturbed, they will retract their tentacles and body to small buds. They catch small creatures (copepods, Daphnia etc.) with their tentacles which can sting, making it easier for them to haul the pray in to their mouth opening. They pose no threat to adult fish, shrimp or snails (might cause some irritation if they touch the Hydra), but newborn fish and shrimp fry are in danger.

sniperjoe2 03-20-2008 01:36 PM

yep yhis is it thanks for the help =)


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