Summary:
- One of Singapore's three remaining giant clam species, the Tridacna gigas, has not been observed since 2003, according to a National University of Singapore (NUS) scientist.
- The giant clam is a protected species in Singapore, and its disappearance is concerning as it is a key component of the island's marine ecosystem.
- Researchers are unsure of the exact reasons for the decline of the Tridacna gigas population, but overharvesting and environmental changes are likely contributing factors.