The lifespan of the black thorns eye is about 16 years. It feeds on zooplankton and is easier to raise. After understanding these, let's take a look at the morphological characteristics of the black thorn.

The black thorn eye pattern hanging head is small, and the outline of the back of the head is not Particularly protruding. 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; the caudal fins are concave, and the adult fish is crescent-shaped. Adults are light blue, with many blue horizontal lines on body and head, and yellow upper lip; an irregular yellow patch close to the back of the eyes and two yellow horizontal bands in front of the eyes; the caudal fin is blue, and the remaining fins are light brown; The base of the dorsal fin has a black-brown stripe, which gradually thickens toward the rear; the membranes of the dorsal and anal fins have inconspicuous transverse bands; the caudal fin has a black margin, and the caudal peduncle spinous groove is black, hence the name black spiny eye pattern.