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aqua International Journal 15(2)




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Volume 15, Issue 2

15 April 2009

John E. Randall and John L. Earle: Variation in habitat and color of the Hawaiian scorpionfish Sebastapistes coniorta, pp. 61-68

Small scorpionfish specimens found in two old Bishop Museum lots of Sebastapistes ballieui from the Hawaiian Islands and suspected of being the non-Hawaiian S. cyanostigma, are re-identified as the Hawaiian endemic S. coniorta. The wide-ranging Indo-Pacific S. cyanostigma is distinguished from S. coniorta in having numerous white dots rather than small dark brown spots, and in the structure of the double suborbital ridge (merging to a single ridge posteriorly in S. cyanostigma). Unusual variation in the habitat and life color of S. coniorta is documented.

William F. Smith-Vaniz: Three new species of Indo-Pacific jawfishes (Opistognathus: Opistognathidae), with the posterior end of the upper jaw produced as a thin flexible lamina, pp. 69-108

Six Indo-Pacific jawfishes of the genus Opistognathus, all with the posterior end of the upper jaw produced as a thin flexible lamina, are described. Three were previously named (O. nigromarginatus Ruppell, 1830; O. castelnaui Bleeker, 1860 and O. muscatensis Boulenger, 1877) and the following are described as new species: O. cyanospilotus, from the Andaman Sea and Bali, has a uniform yellow caudal fin, no bands or dark blotches on sides of body or dorsal fin, and several blue blotches or spots on the opercle, cheeks and upper jaw; O. randalli, from Indonesia and the Philippines, has the dorsal portion of the eye conspicuously golden in life, sides of body usually with 7 to 10 yellow-orange bands, the dorsal, anal and caudal fins with narrow pale (blue in life) margins; O. variabilis, known from the Maldive Islands to Palau, has a highly variable color pattern ranging from yellow to brown or blue, and although a series of 7 or 8 dark blotches are often present mid-laterally on sides of juveniles and females, they can be faint or absent in nuptial males and in both sexes at some localities. The upper jaw length is also variable in this species, ranging from relatively short to very elongate, but jaw growth trajectories are consistent at any given locality so long and short-jawed morphs never occur together. Combinations of meristic values and color pattern differences easily distinguish this jawfish from all other species of Opistognathus. Reasons for treating such variation as circumscribing a single species are discussed and the mosaic pattern of variation is documented.

Richard Winterbottom: A new species of the genus Trimma (Percomorpha; Gobiidae) from Helen Reef, South-West Islands of Palau, pp. 109-116

A new species of the genus Trimma is described based on 41 specimens from the southern tip of Helen Reef, SW Islands of Palau. Trimma hotsarihiensis n. sp. is characterized by the absence of scales in the predorsal midline, no cheek or opercular scales, a broad U-shaped interorbital trough and a slit-like postorbital trench, a fleshy ridge, the dermal crest, in the dorsal midline extending from the first spine of the dorsal fin and decreasing in height anteriorly, reaching to a vertical above the vertical limb of the preopercle, no elongate dorsal spines, usually 9 dorsal-fin rays, 17 pectoral-fin rays with 6-12 of the inner rays branched, and an unbranched fifth pelvic-fin ray. When freshly collected, T. hotsarihiensis is yellow with small yellow spots on the caudal fin, a black basal stripe in the dorsal and anal fins bordered distally by an approximately equalwidth yellow stripe in the dorsal fins and rest of anal fin yellow, a short, diffuse, irregular dark stripe extending posteriorly from immediately above the opercle, and a dark, pupilwidth, internal band extending along the midline from the occipital region, tapering out at the end of the caudal peduncle. Preserved specimens are straw-yellow, with the dark external stripes in the dorsal and anal fins and above the opercle, and, usually, the dark internal bar, still visible. Trimma hotsarihiensis is currently known only from Helen Reef just north of the equator in the western Pacific Ocean.

Friedhelm Krupp and Kevin Budd: A new species of the genus Garra (Teleostei: Cyprinidae) from Oman, pp. 117-120

Garra smarti
n. sp. a new species of the cyprinid fish genus Garra Hamilton, 1822 is described from Wadi Hasik, Dhofar Province, Oman, based on 11 specimens of 24.8 to 49.5 mm standard length. It differs from all other Arabian Garra by the following combination of characters: acutely pointed snout tip; anus immediately in front of anal-fin origin; 3 unbranched and 7 branched dorsal-fin rays; 34 or 35 pored scales in the lateral line, 14-16 circumpedunclar scale rows; 13-15 gill rakers on lower limb of first gill arch; mental disc small, usually longer than wide.

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Weight 0.25 kg
Dimensions 26.6 × 20.3 × 0.4 cm
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