Key to genera of Phocoenidae in Korea

1 Dorsal fin absent; 15–22 teeth on each tooth row; maximum size about 2,3 m............................ Neophocaena

- Dorsal fin present..................................................................................... 2

2 Dorsally dark gray and ventrally white.............................................................. Phocoena

- Black body with white flank-ventral patch between anus and mid-belly................................. Phocoenoides