Ray finned fish, a major evolutionary branch of bony fish, is characterized by its fins being fan-shaped membranes supported by spoke shaped bony/keratinous spines, which differ from the paddle shaped fleshy fins supported by multi jointed appendicular bones in meat finned fish or by cartilage columns in cartilaginous fish.

Also known as tuna, it is a marine fish belonging to the order of bony fishes, order of tuna, and family of tuna. Known for its fast swimming and long-distance migration, it is an important predator in the ocean. The body is streamlined with well-developed muscles, capable of high-speed swimming in water and preying on small fish and crustaceans. The body size is usually large, and adult individuals can grow up to several meters long and weigh several hundred kilograms. Widely distributed in tropical and subtropical waters around the world, it is an important component of fisheries in many countries. It holds an important ecological position and also has extremely high economic value. The meat is delicious and rich in protein and unsaturated fatty acids.

Catfish is a species of bony fish in the family Siluridae of the order Siluriformes, also known as pond lice or catfish. Its body is flattened on the side, its abdomen is flat and soft, it can expand or contract, its body height is greater than its head height, and the external contour of the whole body is chiseled. Living in a reservoir with abundant water, grass, and muddy bottom layer. During the day, it often hides in deep water and is active in foraging at night or dawn. After autumn, they live in deep water or mud to overwinter, and their feeding intensity decreases. When feeding, do not gather in groups and hide in the crevices of the underwater rocks to observe. Carnivorous, feeding on small benthic fish as well as small nearshore fish. Catfish have strong adaptability and fast growth, and have been listed as one of the three major freshwater fish species in natural water bodies in China.