Lawnmower Blenny & Emerald Crab fighting?

[clarki]

I have a 29 gal. reef tank that's been up and running a little over a year now with a few polyps and shrooms, some pulsing xenias and an anemone. I also have a serpent star, a brittle star, a queen conch, an emerald crab, a lawnmower blenny, a clarki clown, 2 green chromis, a yellow wrasse, and a blue damsel... plus about 5 blue leg hermit crab and some nice healthy plants (green grapes). Today I found my emerald crab and my lawnmower blenny fighting. They were really going at it and I don't want either one to die! Has anyone else ever had this problem? Any ideas?

 

[wax32]

Emerald Crabs like most crabs will eat whatever they can, so if your crab has gotten large enough to be a problem to your LMB, trade him in for a smaller one. BTW, that's a LOT of fish in a 29.

 

[clarki]

Yea, I know it is.. I just bought a 60 gal. I'm upgrading this week. I am moving so the timing was perfect. But my water quality has been perfect and everything is growing and propagating....