Feather closed knife
Feather closed knife is also known as feather knife and Nanyang closed knife. , Chrysostom's groom. It is so named because it has a dorsal fin that stands upright like a feather. The body of Feather Blade is white with three straight brown stripes, and its shape is very special.
The body of adult fish with closed feathers is very flat on the sides, and the dorsal edge is high and raised, slightly triangular. The head is short and small, the snout is pointed and not tubular, and the posterior edge of the anterior nostril has a nasal valve. The left and right jaws are approximately equal in length, and the teeth in both jaws are thin and pointed. The body is covered with large and weak comb scales, the head, chest and fins have small scales, and the snout has no scales. The dorsal fins are continuous. The body is silvery white, with 3 black to brown slanting strips on the side of the body. The first black slanting strip covers the eyes, pectoral fin base and pelvic fin from the back of the head downward; the second brown slanting strip extends from the 4th to 5th hard spine of the dorsal fin. It spreads downward to the back of the anal fin; the third light brown diagonally extends from the 9th to 12th hard spines of the dorsal fin downward to the base of the caudal fin. The snout is yellow. The soft rays of the dorsal fin and caudal fin are light yellow; the soft rays of the anal fin have eyespots; the base of the pectoral fin and the pelvic fin are black. There is not much difference between juvenile fish and adult fish. The only difference is that the juvenile fish has a black eye spot with a white edge on the soft ray of the anal fin, which gradually disperses and disappears as it grows.
</p>
</p>