Any species of bony spiny-rayed fishes in the family gobiidae. Gobies are small fishes with large heads and elongated tapering bodies. They comprise the largest family of marine fishes, with over 2000 species. Gobies range in size from the mudskipper (about 15-30 cm) to the tiny pygmy goby, Eviota sigillata, a 1-2 cm long coral reef-dwelling goby which has the shortest lifespan for any known vertebrate.