The video discusses manatees, highlighting how sailors once mistook them for mermaids. It describes their large size and car-like appearance, their graceful swimming abilities, and their habitat in the western Atlantic. Manatees are endangered and face breeding challenges, as females give birth infrequently. Despite their size, they are gentle creatures with no natural enemies, though they are sometimes harmed by boats. Manatees are also known as sea cows.

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