We have just stumbled across a contaminant in SAE shipments which has no dark markings on the side (not uncommon when SAEs are very scared) and a blunter, rounded snout. Talking to the supplier, he says the fish is known in the trade as (I am not making this up): THE WORLD'S BEST ALGAE EATER It appears it may be no known fish. It is supposedly from India. Anybody more up on this than I am (not hard)!?