Im not sure what kind of algae it is though. It reminds me of grass, because it is similar in color, and it doesnt grow more than about 3/4" long. I have 2 turbo snails, 2 hermit crabs, and an algae blenny, but none of them eat it, however they do eat the small amount of hair algae that grows in my tank. I was thinking about getting some kind of crab, are there any that will eat it? Also, will a sally lightfoot or emerald crab get along with a coral banded shrimp in a 20 gallon tall? Thanks in advance for any help!