Devilfish have the Cleave feat, which I found a bit odd at first, but then I started thinking...
It has a Tentacle attack that has the Grab ability. I also has a Savage Bite that it can use anytime it makes a successful Grapple check.
Can a Devilfish use Cleave to Tentacle-Grab-Bite-disengage Grapple as a Free action-Tentacle-Grab-Bite?
Bump
Right. Sorry, I figured that was implied with Cleave, but yes. Wow, so that's 25.5 damage average each to two creatures as a Standard action. Not many CR 4 creatures that can move and then deal 51 average damage.