Giant Clam (Kima)
Tridacna spp.
A spectacular reef bivalve that can be enormous and brightly colored, with a living mantle.
HabitatShallow coral reefs and reef flats
DietFilter-feeding plus symbiotic algae
SizeUp to 1.2 meters
BehaviorSessile; mantle open in sunlight; closes when disturbed
Where you might see it
On clear, shallow coral gardens, scan reef flats and bommies for large shells with vivid mantles.
How to spot it
Look for a thick, ridged shell embedded in coral rock with a bright, wavy mantle. Approach slowly.
Responsible Encounter Guidelines
- •Never touch the mantle (stresses the animal).
- •Dont stand on reef to photograph.
- •No souvenir collection.
- •Avoid stirring sediment.
- •Use buoyancy control; keep fins up.
Gallery
Conservation Status
Some species Critically Endangered due to overharvest and habitat decline.