Tam Giang lagoon is full of shrimps, crabs and fishes. The lagoon is the largest brackish lagoon in Southeast Asia, and belongs to the longest system of Tam Giang - Cau Hai lagoon in Vietnam, with a length of about 24 kilometers. Covering an area of about 52 square-meters, Tam Giang lagoon stretches from O Lau estuary to the Perfume river’s estuary.