Japanese Journal of Ichthyology

, Volume 36, Issue 3, pp 299–302 | Cite as

Chromis okamurai, a new damselfish from the Okinawa Trough, Japan

  • Takeshi Yamakawa
  • John E. Randall


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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Literature cited

  1. Randall, J. E., H. Ida and J. T. Moyer. 1981. A review of the damselfishes of the genusChromis from Japan and Taiwan, with description of a new species. Japan. J. Ichthyol., 28(3): 203–241.Google Scholar
  2. Yamakawa, T. 1985. Pomacentridae. Pages 522–525, 695–696in O. Okamura and T. Kitajima, eds. Fishes of the Okinawa Trough and the adjacent waters, II. Japan Fisheries Resource Conservation Assoc., Tokyo, pp. 418–781. (Tn Japanese and English.)Google Scholar

Copyright information

© The Ichthyological Society of Japan 1989

Authors and Affiliations

  • Takeshi Yamakawa
    • 1
  • John E. Randall
    • 2
  1. 1.Kochi Senior High SchoolKochiJapan
  2. 2.Bernice P. Bishop MuseumHonoluluUSA

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