Are Ember Blennies jerks?

[Alenya]

Looking to add a Blennie to my 55g tank for algae control. Are ember Blennies reasonably peaceful?

I have no other blenny or rock percher just a YWG.

Other occupants are perculas, flasher & fairy wrasse and Valentini Puffer.

 

[eatbreakfast]

They will defend their territory and can be aggressive to other perching fish, but based on your occupants shouldn't be too much of an issue.