The adult body length of bullfrog is generally between 70- 170 mm, and the longest is more than 200 mm, making it one of the largest frogs in the world. The skin is usually smooth, without dorsal folds, and the snout is wide and round. Women's eardrums are about the same size as their eyes, while men's are obviously larger than their eyes.

Fold from the back of the eye around the top of the eardrum to the armpit, especially in men. The fourth toe is too long, and the webbed toes can't reach it at all. Due to different regions, body color often changes greatly.

The back turns from green to brown, but most of it is green. Usually mixed with brown spots, sometimes mixed with gray or brown mesh patterns. The ventral surface is white, sometimes with gray spots, and the adult throat often has yellow stripes.

Distribution of origin:

Bullfrog is native to North Niu Jiao, so it is named for its loud voice similar to that of. It is rich in nutrition, delicious, fast growing and has strong environmental adaptability, and has been introduced and cultivated in most countries in the world.

Bullfrog was introduced into China from Cuba in 1959, and was widely cultivated in China around 1990s. In recent years, bullfrog has become one of the important characteristic aquatic products in aquaculture in China. Bullfrog has been cultivated on a large scale in Fujian, Guangdong, Zhejiang and other coastal areas in China, and the output of bullfrog has increased year by year, reaching1.5000 tons.