He might just be establishing territory and he may chill out. It’s possible….
I don’t have a lawnmower blenny but I have a horned blenny in my seahorse tank and he picked on one of my horses ONCE. He never bothered them again. We call him the "pig" because he’ll jump in the middle of the feeding station (a shell attached to a coral skeleton) and make the mysis fly around. The horses don’t mind him a bit, and seem to like how he makes their dinner wiggle…. lol. He lost one of his horns, though, lounging in the food dish, one of the horses must have snicked it right off accidentally while eating. It’s growing back, though. I have a midas blenny in another tank and she is very territorial, so I don’t know that they would do well with seahorse, but it will depend on each fish and how aggresive they get. Your tank is big enough that your blenny may decide on a spot that’s his and stop picking on the seahorses. But if I observed any more aggressiveness I would sure want to get him out. You might have to get a friend to help catch him, each of you with a net.
Good luck!
Ocean Rider, Inc. is an Organic Hawaiian-Based Seahorse Aqua-Farm & Aquarium that Follows Strict Good Farming Practices in Raising Seahorses and Other Aquatic Life.
