Rhinogobiops nicholsii

Blackeye Goby

Family: Gobiidae · Class: Actinopterygii · Order: Gobiiformes

The Blackeye Goby is a small marine fish characterized by its distinctive dark-spotted eye pattern and elongated body structure typical of the family Gobiidae. Adults typically measure 8 to 15 centimeters (3.1 to 5.9 inches) in length, with a moderately compressed body and a large head relative to body size. The species displays variable coloration ranging from pale brown to reddish-brown, often with darker mottling or banding patterns. The distinguishing feature is the prominent black eyespot or dark coloration around the eye region, which gives the species its common name. Blackeye Goby occurs along the Pacific coast from British Columbia, Canada, south to Baja California, Mexico. In California waters, the species is distributed from the Oregon border to the Mexican border, with documented populations throughout the Channel Islands region. The species is particularly well-documented around the Southern California coast, including areas such as Farnsworth Bank and other marine protected areas where it has been observed as part of the resident fish community (CDFW 2025). This species inhabits rocky reef environments, typically at depths ranging from shallow subtidal zones to approximately 200 meters (656 feet) (FishBase 2025). Blackeye Goby shows a strong preference for areas with complex bottom topography, including rocky outcrops, crevices, and areas with moderate to high relief (Miller & Lea 1972). The species is commonly found on both natural rocky reefs and artificial structures. The species occurs in marine protected areas where it finds suitable habitat among pinnacles and rocky substrates (CDFW 2025). Blackeye Goby exhibits typical gobiid behavior, remaining closely associated with the bottom substrate and using crevices and small caves for shelter. The species is generally sedentary, with individuals maintaining small home ranges within suitable rocky habitat. Diet consists primarily of small invertebrates, including crustaceans, polychaete worms, and other benthic organisms found within the reef environment. Reproductive behavior follows the general gobiid pattern, with males likely establishing territories and providing nest care, though specific details of spawning behavior for this species require further documentation. The conservation status of Blackeye Goby appears stable, with no current federal or state listing status. The species benefits from protection within California's network of marine protected areas, including locations such as Farnsworth Offshore and Onshore State Marine Conservation Areas, where all take is prohibited (CDFW 2025). The species' association with rocky reef habitats provides some resilience against habitat degradation, though ongoing monitoring of reef ecosystems remains important for long-term population assessment. No specific population trends or conservation concerns have been documented for this species as of December 2025.

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, and more.