The distributions of five species of freshwater goby,
Rhinogobius spp.(
Rhinogobius sp.CB, OR, LD, DA and CO, according to recent morphological definitions) and R.
fiumineus were surveyed at 264 points in 114 streams and rivers on the coastal area of Ise Bay, Japan.
Rhinogobius sp.CB (cross-band type) was found in most of the rivers investigated, with
R. sp.OR (orange type) occurring in many rivers on the Atsumi and Chita Peninsulas. The possibility of separate origins for the latter populations was discussed.
Rhinogobius sp.LD (large-dark type) was found longer rivers flowing across the plains.
Rhinogobius sp.DA (dark type) inhabited only a few rivers on the Shima Peninsula. In those rivers habitat segregation was observed between the former and
R. flumineus.
Rhinogobius sp.CO (cobalt type) occurred in rivers on the Kii Peninsula.
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