most recognized mark on a true ryukin is the hump straight after the head.
bigger the hump better quality ryukin you got
but looks like its got ryukin in the lines somewhere ....
its DEFINATLY a low quality ryukin. theyve been poorly breed all over so most of them have only 1 of the usual traits. mine has the smallest humpback ever but is almost as wide as he is long! yours just has the humpback thing and no to much of the golfball in water look. good luck with it though