ABSTRACT
Toxopneustes elegans and T. pileolus co-occur and have the same spawning season in winter in Okinawa. T. elegans , which can be identified by its medium size and the purplish-black stripes on its spines, was recorded for the first time in Okinawa in 1992. The external appearance is uniform in T. elegans, but varies considerably in T. pileolus. In same locality, a few individuals (natural hybrids ?) were found with purplish-black stripes on the spines (characteristic of T. elegans) and a large test (characteristic of T. pileolus ).
