What is this?

[Swimchic326]

Found this on the side of our tank. Looks like a tiny snail but has weird suction cup looking tentacles coming out of it. Sorry for the bad pics. It's hard to get a good one with the angle of it.

 

[User Name]

You might need better photos to get help.

 

[mr_X]

Corynactis. They are harmless.