What do we have here?

[Carlon]

Found this on the glass this morning.

 

[Reeferdood]

That looks like a type of nudibranch..

 

[Cnidoblast]

In general it is wise to remove any nudi's you did not intentionally add into your system

 

[Carlon]

I walked away for a few minutes and he was gone. Either they move very fast or one of my wrasse ate him.

 

[Maritimer]

Most nudibranchs feed on very specific cnidarians. The most common in the hobby seem to feed on either zoanthids or Montipora corals. If you've got either of those two in your tank, they'd be the place to keep an eye on.

~Bruce