7 animals whose ears can't be seen

Whales have small openings for ears, but they're not externally visible.

Like whales, dolphins have ears located behind small openings, hidden in their sleek bodies.

Frogs have tympanic membranes, but they're covered by skin, making their ears invisible.

Snakes lack external ears altogether, but they can detect vibrations through their jawbones.

Most fish have ears, but they're internal and not visible from the outside.

Sharks have tiny ear openings, but they're not prominent externally.

Ants have ears, called Johnston's organs, on their legs, but they're not visible externally.

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