Cosmocampus arctus (snubnose pipefish) is a species of marine fish of the family Syngnathidae. It is found from Tomales Bay, California, to Mazatlan, Mexico, and throughout the Gulf of California. It lives on rocky or coral reefs, among eelgrass and other seaweeds, and among algae. It inhabits depths to 10m, where it can grow to lengths of 12 cm. This species is ovoviviparous, with males carrying eggs in a brood pouch before giving birth to live young.Dawson, C.E., 1985. Indo-Pacific pipefishes (Red Sea to the Americas). The Gulf Coast Research Laboratory Ocean Springs, Mississippi, USA Monogamous mating has also been observed in this species.
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