An assortment of sergeant fish in the waters off Hawaii

Most of the fish in this photo, with five vertical black bars, are Indo-Pacific Sergeants. But there are a few fish where the bars fade away and these are endemic Hawaiian Sergeants. The two species sometimes interbreed, so some of these fish might be hybrid sergeants. Regardless, they’re a familiar sight in the water, usually swimming in large groups and feeding high in the water.

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