This is a dwarf lumpsucker (Eumicrotremus awae) sitting on an orange sea squirt (Halocynthia roretzi). Known as a dango-uo in Japanese, this fully grown fish measured about one centimeter in length. I photographed it just before the beginning of the annual reproductive season. These lumpsuckers generally live for only one year. Photographed at magnification of two times life-size.
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