Report of a twospot cusk Neobythites bimaculatus from Japan with rare ocellus pattern

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  • Report of a twospot cusk Neobythites bimaculatus from Japan with a rare ocellus pattern

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A specimen of twospot cusk Neobythites bimaculatus(237 mm in standard length) was collected in September 2014 from near Okinawa Island, southern Japan. This ophidiid species usually has two distinct ocelli on the dorsal fin and none on the anal fin. In addition, minor ocellus patterns are also known; they include a faint third ocellus rarely on the dorsal fin and two faint ocelli on the anal fin of a smaller specimen (73 mm in standard length). The present specimen possesses both a faint third ocellus on the dorsal fin and a single faint ocellus on the anal fin. This ocellus patttern has not been seen in this species, hence we report it with a detailed description and a slight alteration to the diagnosis.

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