Unknown Creature:

[genebeard8]

I have a seahorse tank, and Im looking for someone who can tell me
what this unknown worm is I have in my tank!! And they are breeding
really fast, started out with 2, now there is about 20 that I can
count and probably more...
They came in on a shipment of plants I got from Florida...
I need to know if they are a threat to my seahorses, and what they
are??? Some people are saying it's a Medusa Worm, or a Eunicid, but
no one is certain!!!!
Please help!!!!
genebeard8

 

[Bongo Shrimp]

Medusa worm. Only bad if it dies, as it releases toxins that can crash the tank. I'm not trying to scare you, but you should try to get them out asap.

 

[geso]

:It is sea cucumber > Dendrochirotida no problem!!:twitch:

 

[Elysia]

I think it may be some kind of Leptosynapta spp. Didn't you say that you thought that these creatures came in on some algae from FL? There is a species that is found down there. The one I am linking to isn't it, but it was the only one I came across that had a photo.

http://www.habitas.org.uk/marinelife/species.asp?item=ZB5260