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Chromis okamurai,a new damselfish from the Okinawa Trough,Japan
Authors:Takeshi Yamakawa  John E. Randall
Affiliation:1. Kochi Senior High School, Kitabata-cho, 780, Kochi, Japan
2. Bernice P. Bishop Museum, P. O.Box 19000-A, 96817, Honolulu, Hawaii, USA
Abstract:A new pomacentrid fish,Chromis okamurai, is described from a single specimen taken from the Okinawa Trough (25°53.4′N, 123°59.4′E), in 135–175 m. This species is most closely related to the deep-dwellingC. mirationis, sharing with it the same meristic data (in particular XIV dorsal spines and 2 upper and lower caudal spinules), large eye, and relatively deep body. It differs in having a small round posterior nostril (large and slit like inmirationis), longer second anal spine, shorter pelvic fins, and in color: two dark brown stripes on body and a pale pectoral-fin axil (mirationis has a single, midlateral, yellow to yellowish brown stripe which extends broadly onto lower part of caudal fin, and a black pectoral axil).
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