The two dorsal fins are placed far back on the body, with the first originating about over the middle of the pelvic fin bases and the second originating over the anal fin. The second dorsal fin is much smaller than the first, and also smaller than the anal fin. Males have short and thick claspers.
The two dorsal fins are positioned far back on the body, with the first arising near the middle of the pelvic fin bases and the second above the anal fin. The second dorsal fin is significantly smaller than the first and also smaller than the anal fin. Male fish possess short and thick claspers.