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Which gasterosteiform fishes can tolerate a wide range of salinity?
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gasterosteiform
Lined seahorse (Hippocampus erectus).
Within the order Gasterosteiformes, certain species of sticklebacks, pipefishes, and seahorses are notable for their ability to tolerate a wide range of salinity.1
Specifically, among the stickleback family (Gasterosteidae), the three-spined stickleback (Gasterosteus aculeatus) is widely distributed in both fresh and salt water, and the four-spined stickleback (Apeltes quadracus) is known to inhabit both marine and freshwater environments.2