What is this?

[jords]

Originally Posted by HaZRaTTy

It doesn't look like aptasia? Please get a more clear picture.

My 2nd guess would be definetly sponge that being said the picture differences between a sponge, and aptasia are quite significant.

If you are not sure just to touch it and if it receeds then its aptasia, if it just chills and feels like a sponge. You guessed it, Its a SPONGE!!!

I believe you can see the sponge in that photo, under the damsel's belly, and then the aptasia at the bottom of the photo. I'll get a more clear picture of the two tonight hopefully.