creature in live rock

[Hayley 87]

hi im hayley and new to the site! ive got a 33gallon marine aquarium which has been up and running for around 2months, housing 2 clowns 2 shrimps and 4 hermit crabs. I also have 4 pieces of live rock in which i have been finding lots of interesting creatures!!
The first is like a piece of clear jelly stuck to the rock, but swaying out like a kind of worm. It only comes out when my dull blue light is on, reminds me of a ghost!!
The second is very exciting...from looking inside the tank it looked like a brown piece of jelly stuck to a piece of my rock. But on closer inspection (lifted the rock out of water!) it reminds me of a toad with no legs!! He was squirting water at me but never moved.
Ive been searching the web trying to figure out what these creatures are and if they are harmfull to my fish.
Please help *twirlysmi

 

[<>< Sesheru ><>]

if any thing i would think they are benificail to the tank with live organisms from the ocen but yea if they look kinda threatening look more up

 

[1979camaro]

They could both be some sort of sponge. I believe, based on your description, I have both growing in my tank as well. I've never actually tried to ID them. Neither one will be harmful to your fish. If you have coral, I would be more concerned about that; if they spread aggressively they could choke out zoanthids and the like.

A picture would really help.

 

[Airborneguy]

Sounds like an aiptasia anemone(clear one) and mojano anemone(brown one). Without pics that's my guess. Both need to be removed and will quickly overpopulate your tank.

 

[1979camaro]

The descriptions really don't sound like anemones, but if you do a couple of quick yahoo/google searches you should be able to tell. To correct the spelling above, you want to search for: "aiptasia" and "majano".

 

[Airborneguy]

Never saw a sponge look like jelly, but that's just me...

 

[Airborneguy]

PS... it is aiptasia, but you were right on majano...

 

[1979camaro]

Absolutely correct.