The Blue Spotted Sea Hare, Dolabella sp., also known as the Wedge Sea Hare, is one of the best algae-eaters in the home aquarium. The Blue Spotted Sea Hare can clean an entire 125 gallon reef tank of all hair algae in about two weeks - they are quite the efficient janitors. They are rather sensitive to pH and salinity changes and can take a little while to fully acclimate to a new tank (they should be drip acclimated). Featuring a dulled grey/brown color with muted blue spots and soft spiky appendages, the Blue Spotted Sea Hare makes for an interesting invert.
They are slow moving and well camouflaged within the rocks of a reef tank. The Blue Spotted Sea Hare is reef safe and is a relatively risk-free addition to any tank as it is an incredibly beneficial algae-eater.