Nearly straight, hammer shaped, with a prominent indentation in the center.
Juvenile hammers are slightly more curved than adults in the same species.
The first dorsal fin is tall with a pointed tip and recurved in shape.
The second dorsal fin is also high but not as much, having a concave shape.
Large, with a prominent leading edge and more recurved in the rear area.
Closely spaced, tiny V-shaped scales covering all the skin of the shark.