''Neophocaena'' is a genus of porpoise native to the

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and Pacific oceans, as well as the freshwater habitats of the Yangtze River basin in

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. They are commonly known as finless porpoises. Genetic studies indicate that ''Neophocaena'' is the most basal living member of the porpoise family. There are three species in this genus:

Description

The finless porpoises are the only porpoises to lack a true dorsal fin. Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some overlap, and this is a not a reliable means of distinguishing them.

References

{{Taxonbar, from=Q10798086 Porpoises Taxa named by Theodore Sherman Palmer Cetacean genera