What are these? Please

[Johnmac]

Dose anyone know what these are? Seem to have a lot of them.

 

[Flreefer]

There is definitely at least one Aptasia, the rest could be sponges. Peppermint shrimp will usually eat the Aptasia, sometimes they won't, I think it depends where the shrimp come from, or species. If the others are sponges, theyre a small, but beneficial part of your bio filter! There are other ways to remove the Aptasia, but I think it's easiest to add a couple of Peppermints, unless you cannot because of your stock(shrimp predators). Good luck!

 

[Johnmac]

Hope this is a better picture.

 

[cmdw4587]

They look like a sponge. Maybe an aptasia.....if you can, get rid of the nasty little aptasia before it spreads (the sooner the better). Leave the sponges they're great little filter feeders!