''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 A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of Colony (biology), colonies of coral polyp (zoology), polyps held together by calcium carbonate. Most coral reefs are built from stony corals, wh ...

, among eelgrass and other seaweeds, and among

algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular mic ...

. 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 Monogamy ( ) is a form of Dyad (sociology), dyadic Intimate relationship, relationship in which an individual has only one Significant other, partner during their lifetime. Alternately, only one partner at any one time (Monogamy#Serial monogamy, ...

mating has also been observed in this species.

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Further reading