Syngnathus euchrous Fritzsche, 1980 .

Chocolate Pipefish. To 31.2 cm (12.3 in) TL (Kristy Forsgren, pers. comm. to M.L.). Santa Rosa Island (Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California) and Redondo Beach, southern California to Bahía Ballenas, southern Baja California (Fritzsche 1980). Depth: surface, intertidal to 18 m (60 ft) (Fritzsche 1980). Garcia et al. (2019) proposed that this species is a junior synonym of Syngnathus californiensis Storer, 1845 .