Pic #4 is def a "Green Severum"... I have 2 Green and 2 Gold Severums... I have my Severums in with a med tiger oscar, med dempsey, fire mouth, pictus cats, and convicts. he looks to be only about 2-4 in long you might get 4 or 5 bucks for him i got mine off of a breeder for 1 a piece. Hope this...