Underwater World Pattaya situated on South Pattaya is the largest and most modern ocean aquarium in Asia with a 100-metre-long acrylic pedestrian tunnel. This new attraction features exotic marine and freshwater fish displays, providing every visitor the unique experience of viewing the creatures from the deep through crystal clear water.

Located just 200 meters south of Tesco Lotus in South Pattaya, the new theme park covers a total area of 12-rai (4,000 square meters of land) and is housed in a structure similar to a large circus tent. The aquarium currently houses over 4,000 marine animals, comprising more than 200 different species from the region as well as some rare creatures from overseas. They all are in the ecosystem of underwater world.

The showcase of Underwater World begins at the shallow "Touch Pool" area which allows visitors to see and interact with underwater lives such as sharks, stingrays, turtles, starfishes, seahorses, many species of fishes, seaweeds, colored corals, small creatures, etc. Then visitors proceed down the state-of-the-art acrylic underwater tunnel which is divided into 3 zones. The first part is themed "Reef Zone" featuring coral reef. Next is "Sharks and Rays Zone" showcasing sharks, sting rays and other creatures from the depth of the sea. The last is "Shipwrecks Zone" featuring various kinds of fish which are edible.

A visit to Underwater World Pattaya would enable visitors gain educational knowledge and entertaining experience as well as learn more about marine animals and be aware of marine conservation.