Cosmocampus heraldi is a species of marine fish of the family Syngnathidae. It is known from only seven specimens, which were found at the Desventuradas and Juan Fernandez Islands in Chile.[1] It inhabits rocky reefs and sandy areas at depths of NaNm (-2,147,483,648feet), where it can grow to lengths of 7cm (03inches). It is expected to feed on small crustaceans like other pipefish.[1] This species is ovoviviparous, with males carrying eggs until giving birth to live young.[2]
Described by Ronald Alan Fritzsche, the specific name honours the ichthyologist Earl Stannard Herald (1914-1973) who had a lifelong interest in pipefish.[3]