What are these small organisms? Found only in very hidden places and not reproducing fast or growing large either.

[Sushiboy225]

I’ve begun to notice 2 new organisms slowly appear on my live rock in areas of low light.

tank is a little over a year old.
Attached are 2 pictures

the organism that is in the pic with one circle, I thought at first was a small feather duster but the frill ends do t seem to retract when disturbed. I think they may be a type of sea squirt, or tunicate?

The other ones are very tiny. They look like they are a hydroid but I’m not too sure. Very very tiny and hard to get a good pic of

 

[Sushiboy225]

Well I answered my first question, they’re pineapple sponges!! I will be keeping them. I have been blessed with many unique and wonderful sponges with this live rock. I can’t wait to see them mature

 

[Sushiboy225]

If it’s aiptasia, which I don’t believe it is, then I will be getting out the laser. The base is super thin and the tentacles don’t appear similar in structure, it resembles aiptasia but not enough for me to consider it that.

 

[Sushiboy225]

Just noticed these white bundles everywhere too. Looks like there is a sponge siphon within the white clumps, but the clumps look like colonial hydroids to me?

 

[Sushiboy225]

Just noticed these white bundles everywhere too. Looks like there is a sponge siphon within the white clumps, but the clumps look like colonial hydroids to me?

 

[Goaway]

Try to get the hydriods in white light picture if you can. All I see is the sponge.

Edit: I see what you are talking about. But it's difficult to make out the stalks. And are most likely colonial hydriods. You will want to pluck those out with tweezers.

 

[Sushiboy225]

Try to get the hydriods in white light picture if you can. All I see is the sponge.

Edit: I see what you are talking about. But it's difficult to make out the stalks. And are most likely colonial hydriods. You will want to pluck those out with tweezers.

I’m getting my dslr fired up lol. Will try to get better pics to make sure. There are weird patches of white that sometimes look like sponges but hydroids within it? Idk looks weird, will get a better idea when the higher res come in.

when removing with tweezers is it like aiptasia where disturbing them can release spores?

 

[Goaway]

No, they don't release spores like aiptasias. However, depending where they are. After removing the stem as close to possible on the live rock, place a dab of glue over the area. These guys can really tuck themselves in from danger.

 

[Sushiboy225]

No, they don't release spores like aiptasias. However, depending where they are. After removing the stem as close to possible on the live rock, place a dab of glue over the area. These guys can really tuck themselves in from danger.

Awesome thank you!

 

[Sushiboy225]

Awesome thank you!

Are solitary hydras a concern? Like non colonial ones?

 

[Sushiboy225]

No, they don't release spores like aiptasias. However, depending where they are. After removing the stem as close to possible on the live rock, place a dab of glue over the area. These guys can really tuck themselves in from danger.

heres some higher res images.

 

[PokeFish]

feather dusters?

 

[PokeFish]

do they recead
when u put something near it

 

[Sushiboy225]

No receding when touched. There was no visible reaction to being disturbed.

 

[Sushiboy225]

feather dusters?

No I know what that is lol. The image with the red arrows is what I'm wondering. the third pic is a closer crop of it.

 

[PokeFish]

not very sure then probably some kind of algae

 

[Sushiboy225]

not very sure then probably some kind of algae

Could it possibly be a sponge? there appears to be one by the red arrow on the left.

 

[Goaway]

feather dusters and hydriod. scrape those off the rock if you can.

 

[Goaway]

Christmas tree hydriods Halocordyle disticha.

 

[Sushiboy225]

Christmas tree hydriods Halocordyle disticha.

What about the sponge looking thing above?