白姑鱼 Pennahia argentata

白姑鱼（学名：Pennahia argentata）是石首鱼科、白姑鱼属鱼类。体延长，侧扁，背、腹缘略呈弧形。头钝尖，口裂大，端位，倾斜，吻不突出。吻缘孔5个，中央缘孔为半圆形的侧裂孔。眼眶下缘达前上颌骨顶端水平线。前鳃盖后缘具锯齿缘，鳃盖具2扁棘；具拟鳃；鳃耙细长，最长者为鳃丝的1.5倍。吻端、眼周围及颊部被圆鳞，鱼背栉鳞，背鳍软条部和臀鳍基有一列鞘鳞，尾鳍基部有小圆鳞。耳石为白姑鱼型，即三角形，腹面蝌蚪形印迹之“尾区”呈“T”字型，末端仅弯向耳石外缘。胸鳍基上缘点在背、腹鳍基起点前，位鳃盖末端下方，背鳍基和腹鳍基起点相对；尾鳍楔形；第二臀鳍棘略短于眼径。腹腔膜黑色，胃为卜字形，肠为2次回绕型，幽门垂11-12个，鳔为白姑鱼型，附枝24-27对，仅有腹分枝，第二对以后呈翼形开展。体侧上半部紫褐色，下半部银白色；背鳍褐色，软条部中间有一银白带；尾鳍黑色；臀鳍无色；腹鳍和胸鳍无色。口腔白色。鳃腔黑色。鳃盖后缘具暗色斑块。

百度翻译提供：

White croaker (scientific name: pennahia argentata) is a fish belonging to the genus white croaker in the family of Sciaenidae. The body is elongated, the side is flat, and the dorsal and ventral edges are slightly curved. The head is blunt and pointed, the mouth is large, the tip is inclined, and the kiss is not prominent. There were 5 rostral foramen and the central marginal foramen were semicircular lateral foramen. The lower rim of the orbit reaches the horizontal line of the top of the anterior maxilla. The posterior margin of the anterior operculum has serrated margin, and the operculum has 2 flat spines; Gill like; The gill rake is slender and the longest is 1.5 times of the gill filament. The snout, around the eyes and cheek are covered with round scales, the fish's dorsal ctenophore scales, the dorsal fin soft strip and the buttock fin base have a row of sheath scales, and the tail fin base has small round scales. The otolith is white Guyu type, i.e. triangular. The "tail area" of the tadpole shaped imprint on the ventral surface is in the shape of "t", and the end is only bent toward the outer edge of the otolith. The upper edge of the pectoral fin base is located in front of the starting point of the dorsal and ventral fin bases, below the end of the gill cap, and the starting points of the dorsal and ventral fin bases are opposite; Caudal fin cuneate; The second hip fin spine is slightly shorter than the eye diameter. The abdominal membrane is black, the stomach is in the shape of a divination, the intestines are in the shape of two loops, the pylorus is 11-12, and the swim bladder is in the shape of a white gudgeon. There are 24-27 pairs of attached branches, only the abdominal branches. The second pair will develop in the shape of wings. The upper part of the body side is purple brown, and the lower part is silver white; The dorsal fin is brown, with a silver band in the middle of the soft strip; Tail fin black; The buttock fin is colorless; Ventral and pectoral fins are colorless. The mouth is white. The gill cavity is black. There are dark patches on the posterior edge of gill cap.