The Siamese carp is the largest species of cyprinid in the world. These migratory fish are found only in the Mae Klong, Mekong and Chao Phraya river basins in Indochina.
Arapaima are native to the Amazon basin and have been introduced to Thailand for aquaculture. They are among the world's largest freshwater fish, reaching as much as 3 meters long.
The Redtail Catfish can reach about 1.8 meters in length and about 80 kg (180 lb) in weight, These colorful large catfishes have a brownish back, with yellow sides and characteristic orange-red dorsal fin and caudal fin. It has a pair of barbels on the upper jaw and two pairs on the lower jaw.
The Mekong giant catfish currently holds the Guinness Book of World Records' position for the world's largest freshwater fish. Attaining an unconfirmed length of 3 meters, the Mekong giant catfish grows extremely quickly, reaching a mass of 150 to 200 kg (330 to 440 lb) in six years.
The Indian carp is commonly found in rivers and lakes in northern India, Nepal, Myanmar. It has a large and broad head, a large protruding lower jaw and upturned mouth. It has large, greyish scales on dorsal side and whitish on belly.
The Tambaqui can reach more than 1 meter in length and 40 kg (88 lb) in total weight. It is similar in shape to the Piranha and is sometimes confused with the carnivorous fish; the Tambaqui is tall and laterally compressed with large eyes and a slightly arched back. Body color is green or yellow with black spots and blemishes in its midbody.
The Red Bellied Pacu can grow to just under a meter in length and 25kg in weight. Its widely know as the vegetarian Piranha. Luckily Pacu dont have razor-sharp teeth, Pacu have squarer, straighter teeth, which are uncannily similar to human teeth.
Also known as the striped wallago catfish or helicopter catfish, is a species of catfish native to Southeast Asia. Its habitat ranges throughout Thailand and it can grow up to 2 meters in length and weigh up to 95 kg (209 lb).
The Chao Phraya Catfish has a wide, flat, whiskerless head. It has a silver, curved underside and a dark brown back. Its dorsal, pectoral and pelvic fins are dark grey and the first soft ray is extended into a filament. Full-grown adults can reach 3 meters (9.8 ft) and weigh up to 300 kg (660 lb).
Spotted sorubim are also known as the shovel nosed spotted catfish. They have extremely long whiskers and are adept at hunting out food items in all conditions. They have a brown upper body with a cream coloured belly, and their upper body and fins are covered in black spots and lines.
The Ripsaw Catfish is a type of thorny catfish native to the Amazon. This species grows to a length of 1 meter and weights up to 20 kilograms (44 lb).
Alligator Gar are the largest species in the gar family, and among the largest freshwater fishes in North America. Gars are often referred to as "primitive fishes", or "living fossils" because they have retained some morphological characters of their earliest ancestors.
The giant snakehead is capable of growing to 1.3 meters in length and a weight of 20 kg (44 lb). It is native to the fresh waters of Southeast Asia. The species has the ability to crawl onto land and breathe air, although they are only able to do this in muddy or swampy areas, hence the nickname "mudfish".