Beaked Whale Identification Guide
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Lateral view of M. grayi head
 
Lateral view of M. peruvianus head
Rostrum elongate and narrow.

Newly expired and live animals exhibit white upper and lower rostrum.

Animal with erupted teeth between 4.5 to 5.8 meters in length
 
Medium length rostrum.

Newly expired and live animals exhibit gray upper and lower rostrum.

Animal with erupted teeth less than 4 meters in length.
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