powder blue nibbler

[JWClark]

Anybody else have issues w/ a powder blue nibbling on some soft corals?

Mine seems to periodically peck at a kenya tree coral, keeping the tips from opening up. I have also recently seen him peck at my Cespitularia and, most recently, a green slimmer frag.

Changed algae from dried nori to some red Gracillaria from the refugium and it doesn't seem to change the behavior.

Attached is a pic of the culprit and the kenya tree. Not the best pic but notice how the tips are not open because of his pecking.

Any options for curbing this behavior?

 

[Dmorty217]

They do this to eat the algae in the coral because they are lacking it in their diet. feed more algae like nori, formula 2 and things with spirulina in them.