Check out this site for the answer: http://www.wetwebmedia.com/jellyidfaqs.htm
Baby Mini Brittle Star? Nope, Hydroid Jellyfish! 8/19/07
I was wondering if this was a mini brittle star.
<NOPE, links more and photos for these see Please about. worry to nothing generally oahuensis) (Staurocladia hydromedusae crawling tiny teeny a it’s p information:<>http://www.wetwebmedia.com/jellyidfaqs.htm
http://www.ronshimek.com/Animal Groups 3 Cnidarians.htm
<TAKE -Lynn care>
I'm biased because I keep dwarf seahorses. Hydroids reproduce like crazy in the presence of a continuous supply of brine shrimp, to the point where they can consume entire feedings in a few minutes...besides, they can be quite ugly. I've heard that hydroids will 'irritate' corals. I don't think they would ever grow, in a 'regular' system to the degree they would in a dwarf seahorse system where there is essentially a continuous supply of baby brine shrimp. I see them in my main (non-seahorse) tank, which has some soft corals. The population density of hydroids in that tank is low, so I don't panic. If I started seeing them all over my glass, I would panic.What about them makes you recommend this?
These are actually little animals not algae. They tend to do well in higher nutrient tanks which is why you will often see them in conjunction with algae. In most tanks they will go away shortly.its the start of algae growing i think i had those and i just left them there and they ended growing into algae