The main differences are different subject classifications, morphological characteristics, and lifestyles, as follows:
Different subject classifications
1. Bonito
Bonito, commonly known as Bombardfish, belongs to the order Perciformes, family Scombridae, and genus Bonito.
2. Tuna
Tuna generally refers to the tuna family, belonging to the order Actinopterygii, order Scombriformes, family Scombridae, genus Slender, genus Rudder, genus Tuna, genus Tuna, and genus Tuna (a total of 5 genera).
Different morphological features
1. Bonito
The body is spindle shaped, blue, robust, without scales, with a smooth surface and well-developed tail fins. There are several longitudinal dark stripes on the lateral abdomen and linear colored stripes on the dorsal side. The tail fin is crescent shaped, with 4 to 7 longitudinal stripes on the side of the body. The back of the body is blue brown, the abdomen is silver white, and each fin is light gray. The head is large, the snout is pointed, and the tail is small.
2. Tuna
Tuna has conical ends, a moderate mouth, and well-developed teeth. The gill membrane does not adhere to the isthmus. The scales are in a cycloidal shape, usually very small, and the body color is metallic, usually blue and silver. Tuna has dark bands and fins. The dorsal fin consists of 9 to 27 densely arranged fins, and the pelvic fin has 6 fins.
Different lifestyles
1. Bonito
The skipjack is widely distributed in the global temperate and tropical waters. It is a pelagic carnivorous upper migratory fish. It likes to cluster in the waters where cold and warm water masses meet. It usually feeds on small fish such as sardine, crustaceans or cephalopods.
2. Tuna
The natural distribution range of the tuna family is wide but sparse. They are distributed throughout the entire ocean, especially in tropical and temperate waters, mainly in low to mid latitude sea areas, concentrated in the Pacific, Atlantic, and Indian Oceans. Tuna is an active predator, feeding on a variety of organisms. The food of a single species includes crabs, shrimp, squid, crustaceans, juvenile fish and invertebrates, as well as fish about 1 meter long. Some smaller species filter plankton through gill rakes.
