Beaked Whale Identification Guide
Tooth position
A single pair of teeth are positioned on the elevated section of the mandible. Subadult animals have teeth that are inclined anteriorly at an angle of 20 to 40 degrees relative to the long axis of the mandible. However, in adult males the long axis of the teeth are almost perpendicular to the long axis of the mandible.

Tooth exposure
Erupted teeth in adult males are covered by gum tissue, with only the tip of tooth exposed. Females and juveniles do not have erupted teeth.

Tooth shape
The teeth are are ovate in cross section.
Mesoplodon peruvianus - Left medial tooth
Juvenile, sex unknown - USNM 571257
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