Note
To date, Bathygobius soporator, Gobius jozo, and Neogobius melanostomus are the reported soniferous species within the large ubiquitous perciform family, Gobiidae. The breeding males of B. soporator emit low pitched grunts (frequency, 100-150 Hz, nonharmonic; duration, 150-350 msec) as a communicatory signal associated with prespawning behavior (Tavolga 1958). Similar hydrodynamic sounds were noted in G. jozo and N. melanostomus by Kinger and Protasov et al., respectively (in Tavolga 1976).