Morphological characteristics of tuna oh:
The tuna has a rhombus body, its cross-sectional shape, slightly lateral. Tuna head is big and pointed. Moderately sloping mouth, upper jaw bone not pulled over head of eye. Except for the chest armor, I have scales. Body scales from thoracic to transverse to the second second fins. Body section almost round.
Ouna has 2 teeth with small teeth, a cane bone and a bone without a tooth. Dorsal fin 2 apart, dorsal 1 includes 10 spines, dorsal 2 very small. Anal fin similar to second dorsal fin, 6 to 9 posterior fins at back. Vertebrae has 39 (20 + 19) females. The sides of the caudal fin have 1 convex fold. Comb bearing many, long and slender.
Biology and ecology:
Similar to Tuna, the tuna is an ocean floating fish. The habitat temperature is from 27 – 27.9 ° C. When mature, they often appear in coastal waters around islands. The feed of the tuna oh is small fish, crustaceans, squid. The tuna is caught by a net, a drag net.
Distribution:
Vietnam: Often encountered in the Gulf of Tonkin and Central Vietnam.
World: India, Sri Lanka, China, Japan, Malaysia, Indonesia, Philippines, Australia and the tropical and subtropical waters of the Atlantic, Pacific, Indian, Eastern African, New Zealand.
Value to use: A common, abundant tuna species. High commercial value, tasty meat is very popular, used to fill boxes, processed in frozen, salt.
