The seahorse head's shape helps the fish stealthily ambush prey, researchers say.
Seahorses are unique among fish for having bent necks and long-snouted heads that make them resemble horses. The overall shape of their body, including the lack of a tail fin, helps make them "one of the slowest swimmers on the planet," said Brad Gemmell, a marine biologist at the University of Texas at Austin. "They don't swim very much — they tend to anchor themselves to surfaces like seagrass with their prehensile tails." (Prehensile tails, like those of monkeys, can grasp items.)
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