Did You Know?

The immortal jellyfish ages backwards when stressed.

When facing environmental stress or injury, Turritopsis dohrnii can revert back to its juvenile polyp stage instead of dying. This process can theoretically repeat indefinitely, making it biologically immortal. Scientists study this species for insights into aging and regeneration.

Did You Know?

The sarcastic fringehead fish uses its giant mouth for territorial disputes.

When two of these fish fight, they press their huge, colorful mouths against each other, like an aggressive...

Read more: The sarcastic fringehead fish uses its giant mouth for territorial disputes.

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Some jellyfish have complex eyes without a brain.

Box jellyfish have 24 eyes of four different types, including eyes similar to human ones with retinas, corneas,...

Read more: Some jellyfish have complex eyes without a brain.

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Elephant seals can hold their breath for two hours.

These marine mammals can dive to depths of over 5,000 feet and stay underwater for up to two...

Read more: Elephant seals can hold their breath for two hours.