Marine mammals can shut off blood flow to extremities like flippers to conserve heat.

Extended lactation periods are characteristic of species like manatees and some whales.

The sperm whale’s spermaceti organ helps with buoyancy, not echolocation.

How do the vocal folds in baleen whales differ in orientation compared to their ancestral terrestrial relatives?

Most marine mammals exhibit spontaneous ovulation rather than induced ovulation.

All cetaceans have prominent external ears to aid in hearing underwater.

Vocal folds in mysticetes are supported by cartilage and surrounded by muscle tissue.

What hypothesis explains how baleen whales may hear low-frequency sounds?

Which factor contributes most to seasonal breeding in marine mammals?

What strategy is thought to be used by elephant seals after long dives?