Common name: crocus giant clam

General information

The Crocea Clam, scientifically known as Tridacna crocea, is a small and colorful bivalve mollusk highly prized in the reef aquarium hobby for its vibrant colors and patterns. This species is known for its ability to bore into substrates, typically settling into coral rock where it can remain well camouflaged. The mantle of the Crocea Clam is often adorned with iridescent spots and can display a range of colors from blues and greens to golds and purples, making it a visually striking addition to any reef tank.

Care

Crocea Clams require stable tank conditions and high-quality water to thrive. They are photosynthetic and depend on symbiotic zooxanthellae within their mantle tissue for nutrition, so adequate lighting is crucial. They also benefit from supplemental feeding of phytoplankton or other fine particulate foods. It's important to place them on a solid surface where they can attach securely, as they do not tolerate being moved frequently.

Reproduction

In the wild, Crocea Clams are hermaphrodites and reproduce by broadcast spawning, releasing eggs and sperm into the water column. In the aquarium, breeding Crocea Clams can be challenging due to the need for precise water conditions and the difficulty in rearing the delicate larvae.

Symbiosis

Tridacna crocea has a mutualistic relationship with photosynthetic algae known as zooxanthellae. The clam provides a safe habitat and nutrients for the algae, while in return, the algae produce oxygen and carbohydrates through photosynthesis, which the clam utilizes for growth and energy.

Habitat

Native to the Indo-Pacific region, Crocea Clams are typically found in shallow coral reefs where they embed themselves into the substrate or coral rock. They prefer well-lit areas with moderate water flow, which helps in the exchange of nutrients and removal of waste products.