Gillichthys mirabilis Cooper, 1864. Longjaw Mudsucker. To 21 cm (8.3 in) TL (Eschmeyer and Herald 1983). Tomales Bay, northern California to Gulf of California (Miller and Lea 1972). Benthic; shallow waters of bays and mudflats (Miller and Lea 1972); depth: to at least 5 m (15 ft) (Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California).