noun
harbor porpoise; common porpoise
Refers specifically to the species Phocoena phocoena, a small cetacean found in coastal waters of the Northern Hemisphere.
北海道の沿岸では、ネズミイルカがよく見られる。
Harbor porpoises are often seen along the coast of Hokkaido.
ネズミ
The harbor porpoise is one of the smallest species of porpoise.