Ok so there where two arapimas for sale at MLFS the owner kept one and the other one stayed there forsale for about 3 months in about a 5 to 10 gal tank I picked him up about a months ago hes about 13 to 14 inches insize. the owners is about 16 inches and displaying allot of red color mine looks pitch black like a black shark, his looks half sliver and half black with some good red coming in so could that 3 months of being kept in a super small tank stunted his coloration? hes in a huge tank now but I dont know why hes so dark like this I've had another one before and he was more silver in front and blk in the back like the fish store owners does any one kno why this is???