Eviota abax (Jordan & Snyder 1901)

Males exhibit non-territorial home range, using small holes, rock cracks, or empty oyster shells as a spawning nest. Aggressive behavior with other males were observed, which includes heads up, open mouth, expanded fins, and lateral displays that could result in biting. The male approaches a female’s home range, displayed, and then leads the female to the nesting area, after which after entering the nest, spawning takes place. The female leaves and the male guards the eggs, cleaning them with his mouth and ventilating them with his pectoral and caudal fins (Ref. 116739).

Males exhibit non-territorial home range, using small holes, rock cracks, or empty oyster shells as a spawning nest. Aggressive behavior with other males were observed, which includes heads up, open mouth, expanded fins, and lateral displays that could result in biting. The male approaches a female’s home range, displayed, and then leads the female to the nesting area, after which after entering the nest, spawning takes place. The female leaves and the male guards the eggs, cleaning them with his mouth and ventilating them with his pectoral and caudal fins (Ref. 116739).

分布於西北太平洋區海域：臺灣、日本南部。

小型魚類，不具漁業價值。

第一背鰭：Ⅵ；第二背鰭：Ⅰ, 9-10；臀鰭：Ⅰ, 8-9；胸鰭：15-17；縱列鱗 23-24；橫列鱗 6-8。體延長，前呈圓筒型，後側扁。頭部具5個感覺孔。體長為魚體高的4.1-4.3倍；為頭長的3.4-3.6。第一背鰭稍高於第二背鰭，雄魚之第1根硬棘延長如絲；腹鰭狹長，各鰭條均有穗狀邊緣，左右腹鰭相靠近，不癒合成吸盤，末端只延長至肛門位置；尾鰭長圓形。體呈淺棕黃色，背側色較深，腹部色淺，體側各鱗片邊緣均呈暗紅色；頭部米黃色，微綠，有不規則的灰紅色斑點多個；眼後方項部的兩側各有1個大黑斑；胸鰭基底上、下方各有1個暗灰色大圓斑；尾柄有1暗色斑點；沿臀鰭基底上方及尾柄腹側有5~6個暗色斑點。背鰭和尾鰭為青灰色，鰭條上均有由暗紅色小點形成的條紋；臀鰭各鰭條略呈灰紅色；胸鰭和腹鰭呈青灰色。(林上智、林沛立編寫 2012/10)

暖水性小型底層魚類，棲息於熱帶珊瑚礁區，主要為潮池。