Common name: China clam

General information

The Porcelain Clam, Hippopus porcellanus, is a large bivalve mollusk known for its striking shell pattern that resembles a porcelain finish. This species is less common in the aquarium trade compared to its relative, the Giant Clam (Tridacna spp.), but it offers a unique aesthetic for dedicated hobbyists. The shell is adorned with distinct ridges and a combination of white and brown coloration, which can make it a centerpiece in any reef aquarium.

Care

Porcelain Clams require stable water conditions and intense lighting to thrive, as they host symbiotic zooxanthellae algae within their tissues, similar to corals. These algae provide the clams with much of their nutritional needs through photosynthesis. Supplemental feeding with phytoplankton and other fine particulate foods can benefit clams that are not receiving enough light or are in the process of acclimating to a new environment.

Reproduction

In the wild, Hippopus porcellanus reproduces by broadcast spawning, where males and females release gametes into the water column. In the aquarium, breeding is rare, but hobbyists can encourage spawning by maintaining excellent water quality and mimicking natural seasonal changes in temperature and lighting.

Habitat

Porcelain Clams are found in the Indo-Pacific region, typically in shallow waters on coral reefs or sandy substrates where they can anchor themselves. They are often partially buried with only the top part of their shell and mantle exposed to the light, which is essential for their symbiotic algae.