The general price of black thorn eye pattern hanging is about 10-35 yuan. Living in the coral reef waters of the Indo-Pacific, the black echidna is a venomous fish that likes to eat zooplankton. However, we should pay attention to the action, color, markings, appearance, etc. of the black thorns eye when choosing, so that we can choose a healthy black thorn.

The black thorn eye pattern hanging head is small, and the outline of the back of the head is not particularly convex out. The mouth is small, end position, with a row of flat teeth in the upper and lower jaws, the teeth are fixed and immovable, and the tooth margins are notched. The spines of the dorsal and anal fins are sharp, and none of the fin rays are elongated. The pectoral fins are nearly triangular, and the caudal fins are concave. The adult fish is light blue, with many blue horizontal lines on the body and head, yellow upper lip, an irregular yellow patch close to the back of the eyes and two yellow horizontal bands in front of the eyes, blue caudal fin, light brown remaining fin, The base of the dorsal fin has a black-brown stripe, which gradually thickens toward the rear. The membrane of the dorsal and anal fins has an inconspicuous transverse band.