I do have a large lawnmower blenny. But it doesn't look like he's eating the hair algea. I also have 6 astria snails,1 brittle star, 2 sand sifters stars, 10 blue leg, 2 emerals crabs,2 peppermint shrimps, 1 cleaner shrimp. Along with a flame angel, hippo, Hiniocus, bar goby, strawberry dotty...