Can you guys help ID this alien looking thing???

[oogie]

Hi everyone!!
I have small zoanthids only nano-pico tank and I started noticing on one of my zoa frags black semi-transparent flexible tube thing growing and then now there are 2 of "arms?" or "branches?".... When I blow it with turkey baster it retracts and it come back. I was going to take frag out and kill it but I was wondering what it is before I make decision keep it or get rid of it! Thanks in advance!!!

 

[EZKLR]

kinda looks like snake polyp from that angle

 

[oogie]

kinda looks like snake polyp from that angle

Wow! I never thought of that! I guess it could def. be it. But I don't see little skirt at the top.

 

[Paul B]

Sponge. Unless it crawls all over the tank.

 

[oogie]

Sponge. Unless it crawls all over the tank.

Thank you so much for the reply! Is it harmful? Shall I get rid of it??

 

[ISpeakForTheSeas]

Hi everyone!!
I have small zoanthids only nano-pico tank and I started noticing on one of my zoa frags black semi-transparent flexible tube thing growing and then now there are 2 of "arms?" or "branches?".... When I blow it with turkey baster it retracts and it come back. I was going to take frag out and kill it but I was wondering what it is before I make decision keep it or get rid of it! Thanks in advance!!!

That's a solitary tunicate (a sea squirt) - it's a harmless filter-feeder. It should have two openings (two holes; it looks like one is at the end of the tube on the left and the other is at the top of the tube on the right).

Neat critter to have as a hitchhiker - looks like it's doing well; I'd try offering it some phyto to try and keep it doing well: phytos like Isochrysis galbana (T-Iso), Chaetoceros sp., Thalassiosira sp., Tetraselmis sp., etc. - a blend containing multiple of these with or without other phyto species would be my preference.

 

[oogie]

That's a solitary tunicate (a sea squirt) - it's a harmless filter-feeder. It should have two openings (two holes; it looks like one is at the end of the tube on the left and the other is at the top of the tube on the right).

Neat critter to have as a hitchhiker - looks like it's doing well; I'd try offering it some phyto to try and keep it doing well: phytos like Isochrysis galbana (T-Iso), Chaetoceros sp., Thalassiosira sp., Tetraselmis sp., etc. - a blend containing multiple of these with or without other phyto species would be my preference.

Wow! Thanks alot for the info! Alright!! I will try to keep him well!