This is a presentation of the ecological system of mangroves and models of the different kinds of animals in the system. From the exhibition, visitors can learn about the lives of aquatic animals according to their habitat in ecological systems of fresh water, brackish water and salt water, for example, the ecological system of mangroves and that of a sand and a pebble beach, the source of sea grass, dolphins, dugongs, the relationships of lives in the ecological system and coral reefs. They can see fish that render economic profit, poisonous and dangerous sea animals that live in heaps of rocks or the source of sea grass, small fish that live in coral reefs along the coast of the Gulf of Thailand and the Andaman Coast. They can enjoy sea flora and coral of different kinds and creatures of strange shapes. There is a small theatre that screens films about undersea adventures and the biological diversity and lives of aquatic creatures.