Species: Hexanchus vitulus, Bigeye sixgill shark

Hexanchus vitulus Springer & Waller, 1969

Atlantic sixgill shark

Slender, head narrow and bluntly pointed; eyes large; mouth large, strongly arched; top teeth small and narrow, with an oblique point; lower teeth comb-like (long, low, serrated, 1st point enlarged), large teeth in 5 rows; six long gill slits none over pectoral base; a single dorsal fin far back on body, well separated from tail fin (separated by 2-3 times the length of the dorsal-fin base), space between bases of dorsal and tail fins > length of dorsal fin base;  tail base relatively long; tail very asymmetrical, lower lobe and notch under top tip well developed.