Unidentified underwater critter Help!

[mndivergirl]

After taking a class look at my tank last night after lights out, with a flashlight if course, I was extremely upset to find what looked like 6-8 aiptasia. The more I looked, the more I found. They appeared to be on my base rock only, no where else. Some looked light brown, some blueish and have even length tenacles. I pulled one of the base rocks out and was going to use our reef clubs majano wands on the stuff. To my surprise, there is a hard outer shell around some of these critters. Anyone have a guess what they could be? These are pictures of one I scraped off of the rock and used a magnifying glass so my camera could take the picture. Is this good or bad? Tank is about 16 months old.

 

[Tautog]

That doesn’t look like a Apitasia

 

[mndivergirl]

Exactly, but when it was on the rock in the water it did.

 

[Adele]

The good news is, it’s not Aptasia. The bad news is that’s all I’ve got but am curious to find out what it is. Someone will know. Hope it’s not a baddie.

 

[Flippers4pups]

Could be baby Euphyilla?

 

[JoshH]

Any pictures of it in water?? #Reefsquad what do you think?

 

[cracker]

is the base hard & stony ?

 

[DSC reef]

Definitely not aptasia. Possibly euphyllia or cup coral.

 

[mndivergirl]

is the base hard & stony ?

Yes!

 

[Crabs McJones]

I agree with possibly a baby euphyllia coral

 

[mndivergirl]

Would it be normal to have 5 or 6 in the same area? I do have Euphyllia in my tank. I think I'll put the rock back in the DT and hope I didn't remove all of them.

 

[mndivergirl]

Any pictures of it in water?? #Reefsquad what do you think?

None of it in the water.

 

[mndivergirl]

Thanks for the help folks!

 

[cristata.reef]

Corallite structure indicates it to be a type of cup coral. There are several genera so getting a more positive ID will be pretty difficult. But a coral nonetheless