Snout is relatively long and angular. Mouth parabolic and long with hooked teeth protruding when mouth closed. Large lateral eyes and small spiracles present. Gill slits large, more than two times eye length. First dorsal fin origin behind pectoral fin insertions. Second dorsal fin about two-thirds the size of first dorsal fin, its origin over or slightly before anal fin origin. Anal fin smaller than second dorsal fin. Second dorsal fin and upper caudal lobe often with distinct black markings.