Abstract

A single juvenile specimen of <TEX>$Thunnus$</TEX> <TEX>$alalunga$</TEX> (8.4 mm in standard length) of the Scombridae was collected from the southeast sea of Jeju Island (<TEX>$127.7^{\circ}E$</TEX>, <TEX>$33.0^{\circ}N$</TEX>) on August 18, 2011. It was identified as <TEX>$T.$</TEX> <TEX>$alalunga$</TEX> based on the following combination of morphological characters: snout elongated; melanophores focused on the dorsal spiny region, but no melanophores on the dorsal soft fin base, anal fin base or caudal region.

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