Tridacna gigas, also known as the giant clam, is the largest bivalve mollusk in the world. It inhabits coral reefs in the Indo-Pacific region. This species is known for its massive shell, vibrant mantle, and symbiotic relationship with algae, which provides it with nutrients through photosynthesis.

Tridacna gigas, commonly known as the giant clam, is native to the Indo-Pacific region. Its geographical distribution includes the eastern Indian Ocean and the Pacific Ocean, particularly around coral reefs in countries such as the Philippines, Indonesia, Malaysia, Papua New Guinea, Australia, and several Pacific Islands.

Tridacna gigas typically inhabits warm, shallow waters of coral reefs, often found at depths ranging from the surface to about 20 meters. The environmental conditions of their habitat include clear water for optimal sunlight penetration, which is crucial for the symbiotic algae (zooxanthellae) residing in their tissues. These clams thrive in water temperatures between 26°C to 30°C.

The giant clam occupies a unique ecological niche within coral reef ecosystems. It is a filter feeder, extracting plankton and nutrients from the water, while also relying heavily on the photosynthetic products of its symbiotic algae. This relationship not only provides sustenance for the clam but also contributes to the nutrient dynamics of reef ecosystems. Giant clams are important for the reef’s biodiversity, providing habitat and food for various marine organisms.