- Uniform grey to greyish-brown with a sloping leading edge.
- Moderately rounded apex and strongly convexed (curving outwards) trailing edge
- The free rear tip is half the length of the base
Note: Looks similar to Blue Shark dorsal fin (not CITES listed). The blue dorsal has a shorter free rear tip and lower angular leading edge, with a more brownish coloration.
Information has been adapted from Abercrombie and Hernandez (2017). Identifying shark fins: implementing and enforcing CITES. Abercrombie & Fish.