Please ID?

[csmicro]

Hello,
I purchased a used 55Gallon Corner Tank from a guy to add to my collection. The tank came with a couple of fish and some live rock. Unfortunately the guy I purchased the tank from had very little knowledge about saltwater as his neighbor gave him the tank when he moved away. He did tell me that there use to be a lot more and they were much larger until he had a heater failure.
I am trying to ID the item in the following pictures.
Please note that the last pic appears to be just the stalk with no tentacles. It also looks to have eaten a pellet I put in the tank prior to taking the picture.
Regards,
-Ken

 

[donald]

i say aptasia (sp) which is not good to have in the tank.

 

[csmicro]

Originally Posted by donald
http:///forum/post/2895807
i say aptasia (sp) which is not good to have in the tank.
Thanks for the quick reply.
I thought it looked a bit like aiptasia but was not sure as I have never seen any this big before. The one in the picture is about 2” tall.
-Ken

 

[clownfishguy45]

That has to be the biggest aptasia I have ever seen!

 

[natclanwy]

Definetly aiptasia, make sure you kill them soon they can spread quickly especially when stressed like from a tank move.