What's is this?

[vence]

I noticed this growing in my tank last month very small and has 5 small polyps.

 

[Reef Dog 29]

Where in the tank is it growing? It could be a nonphotosynthetic coral.

 

[reef lover]

Could be a cup coral.

 

[BestMomEver]

Could be aptasia. Cant tell from the picture. Just an idea. Nothing good ever spontaneously appears in my tank!

 

[vence]

I don't think it's aphasia cause when the polyps retract it's got a hard skeleton.

 

[vence]

Where in the tank is it growing? It could be a nonphotosynthetic coral.

Its growing 2 inches from my sand in a low light area.

 

[samnaz]

Cup coral?

 

[BestMomEver]

You’re right then...not aptasia!

 

[vence]

Cup coral?

I've noticed 2 more spots today on the rock. On on top and one on the back side of the rock.

 

[samnaz]

Do the tentacles appear to have balls on the ends?

 

[vence]

Do the tentacles appear to have balls on the ends?

They come to a point

 

[nfrench2100]

Galaxea maybe? Does it have long sweeper tentacles?

 

[vence]

Galaxea maybe? Does it have long sweeper tentacles?

Not really long. Last month when I fount it only had 3 polyps since then 2 more polyps have grown. They seem to stay small like my meteor shower Cyphastrea.

 

[vence]

Update photo. It started branching. Don't mind the algae

 

[samnaz]

Skeleton doesn’t look like any cup coral I’ve seen... I’m out of guesses.

Does it retract at night? Or during the day?

 

[vence]

Skeleton doesn’t look like any cup coral I’ve seen... I’m out of guesses.

Does it retract at night? Or during the day?

During the day time the polyps expand out

 

[vence]

Skeleton doesn’t look like any cup coral I’ve seen... I’m out of guesses.

Does it retract at night? Or during the day?

could it possibly a coral I had in the tank before. Like my green birds nest or green pocillopora. I know in nature if a pocillopra is unhappy it could send off its polyps and start new colonies.

 

[samnaz]

could it possibly a coral I had in the tank before. Like my green birds nest or green pocillopora. I know in nature if a pocillopra is unhappy it could send off its polyps and start new colonies.

They are notorious for multiplying quickly all throughout tanks. I have no experience with them, have avoided them for that reason.

 

[samnaz]

Got any photos with the polys extended?

 

[vence]

They are notorious for multiplying quickly all throughout tanks. I have no experience with them, have avoided them for that reason.

I have 5 spots like this one. Also it started growing branches in the last month when i started dosing calcium. And I'll have to take one when the light are one.