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Leatherbacks are the largest turtles in the world

Leatherback turtles weigh 750 to 1,000 pounds and are the only sea turtles without scales or a hard shell.

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They are named for their tough, rubbery skin. Leatherbacks have existed in their current form since the age of the dinosaurs.

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Electric eels are not true eels

Electric eels can generate up to 800 volts, and they are more closely related to catfish and carp than to eels.

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Lobsters may live to be 100 years old

Scientists believe some American lobsters live to be 100 years old, and they can weigh up to 44 pounds.

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Dolphins and porpoises have different teeth

Dolphins have cone-shaped teeth, while porpoises have spade-shaped teeth.

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