Entice, yup, once again, the answer to your question is a toss up. many types of animals have been known to eat it, but that doesn't mean the one you buy will. I have a lawnmower blenny, and hair algae is the only thing he WILL eat. I have 2 emerald crabs, and both will eat hair algae. It seems they usually eat algae during the day, grabbing what they can by reaching out from their hiding spots, then during the night they switch to scavangers, looking for detrius and such. My mexican turbos, and regular turbos will both eat hair algae, although they prefer it if it is short, less than 1/2 inch. Anyway, sorry there isn't a guaranteed answer to your question, but I thought I share what was working for me.