Big-eye trevally

Description

The bigeye trevally is one of the larger members of Caranx,growing to a maximum recorded size of 120 cm in length and 18.0 kg in weight.he bigeye trevally is one of the larger members of Caranx,growing to a maximum recorded size of 120 cm in length and 18.0 kg in weight.The species lateral line is moderately arched anteriorly,with 49 to 50 scales in this section,while the straight section contains 0 to 3 scales and 27 to 36 strong scutes.The breast is completely covered in scales.The species has well-developed adipose eyelids,while its dentition consists of an outer row of widely spaced canine teeth and an inner band of villiform teeth in the upper jaw,with a row of widely spaced conical teeth on the lower jaw.The bigeye trevally has 21 to 25 gill rakers and 25 vertebrae.The bigeye trevally shows a change in colour as it ages,changing both overall colour and body patterns.Juveniles are a silvery yellow to silvery brown in colour,and possess five to six dark vertical bands on their sides,rom which the specific epithet sexfasciatus arose.As they mature,the bands fade and become indistinct and the overall colour shifts to a silvery blue above and whitish below.n adults,the bars are completely absent and the dorsal colour is a silvery olive to blue green,fading to silvery white below.In juveniles,the fins are pale grey to yellow with darker edges,becoming darker overall in adulthood,with the anal and caudal fins yellow to black and the second dorsal fin olive to black.The tip of the second dorsal fin has a distinctive white tip.The bigeye trevally also has a small dark opercular spot on the upper margin.