Page "Cetacea" Paragraph 11

Odontoceti are generally capable of echolocation.

From this, Odontoceti can discern the size, shape, surface characteristics, distance and movement of an object.

With this ability, cetaceans can search for, chase and catch fast-swimming prey in total darkness.

Echolocation is so advanced in most Odontoceti, they can distinguish between prey and nonprey ( such as humans or boats ); captive Odontoceti can be trained to distinguish between, for example, balls of different sizes or shapes.

Mysticeti have exceptionally thin, wide basilar membranes in their cochleae without stiffening agents, making their ears adapted for processing low to infrasonic frequencies.