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Hippocampus (fish)

photo by NOAA
A hippocampus (or seahorse) is a genus of fish (family Syngnathidae) found in temperate and tropical waters all over the world.

Seahorses range in size from 16 mm (the recently discovered species [1]) to 35 cm. They are notable for being one of only a few species where the males get pregnant. A seahorse pregnancy lasts approximately two to three weeks. Seahorses are also unusual among fishes for being monogamous.

There are approximately 35 known species of seahorse including:

Seahorse populations have been endangered in recent years by overfishing. The seahorse is used in traditional Chinese herbology. As many as 20 million seahorses a year may be caught and sold for this purpose. [1]

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