The main feature is that there are several longitudinal dark stripes on the abdomen. The dorsal fin of bonito has 8 to 9 small fins; Gluteal fin 14 to 15, flippers 8 to 9. The caudal fin is crescent-shaped with 4 to 7 longitudinal stripes on its side. Its back is blue-brown, its abdomen is silvery white, and its fins are light gray. The largest is 1 meter long, with an average body length of 400 to 500 mm ..
It is a kind of daytime fish, which haunts the surface to a depth of 260 meters during the day and floats at night. It often eats sardines, bamboo baskets and other fish and crustaceans.
Bonito likes to swim in groups with whales and sharks. First, it eats bigger food in the water, and the rest is easily swallowed by whale sharks. Whale sharks also protect bonito, and they are symbiotic. The sea where bonito appears is often accompanied by seabirds, chasing food above the fish.
Bonito preys on sardines and other fry, squid, mollusks and small crustaceans. There are usually hundreds of thousands of fish swimming back and forth in the ocean, feeding on small fish, shrimp and squid. Anchorage is their favorite food. If they find out, they will attack each other from top to bottom, so that the anchovies with nowhere to escape have to jump out of the water.
Bonito is distributed in a vast area from temperate zone to tropical zone, mainly in the Indian Ocean, Pacific Ocean and Atlantic Ocean where the water temperature is higher than 15 degrees Celsius. Both the East China Sea and the South China Sea of China are distributed and produced.
The cannonball fish can lie down freely, and when it is in danger, it will quickly drill into the coral reef hole and erect its dorsal fin to fix itself tightly in the hole. This kind of fish is a carnivore, very greedy, with very sharp teeth, and can bite gravel corals. Its suitable water temperature is 26-28℃. Fish, shrimp, granular materials, small fish and shrimp can all be fed. It likes to live alone and often hides in rocks. Don't mix with small fish or coral, anemones, etc.
Appearance characteristics:
The shell fish has a diamond-shaped body, various colors, unique swimming style (swimming by swinging dorsal fin and pectoral fin), small but powerful mouth and large head, which is easy to be recognized.
Physical characteristics:
The whole length of bonito is 1 m, the body is spindle-shaped, thick and scaleless, and the caudal fin is smooth and developed. The main feature is that there are several longitudinal dark stripes on the abdomen. The dorsal fin of bonito has 8 to 9 small fins; Gluteal fin 14 to 15, flippers 8 to 9. The caudal fin is crescent-shaped with 4 to 7 longitudinal stripes on its side. Its back is blue-brown, its abdomen is silvery white, and its fins are light gray. The largest is 1 meter long, with an average body length of 400 to 500 mm ..
Living habits:
Bonito is a kind of pelagic migratory fish in warm water (on the coast of Japan, bonito migrates seasonally from spring to summer and from autumn to winter). ), distributed in the vast area from temperate zone to tropical zone, mostly clustered in the intersection of cold and warm water masses in the radiation zone and the sea with clear water quality.