Tridacna species Clams are the only members of the Mollusk Family to possess the symbiotic algae, zooanthellae. This enables them to utilize natural sunlight as their energy / food source. Its this internal algae that minimizes their need to rely on filter feeding and is what gives their mantle the exotic colorations. There are actually nine species within this family of Giant Clams.

General Conditions
Temperature - 72 to 80 degrees Fahrenheit
Lighting - full spectrum, 12-14 hours per day (fluorescent, VHO or metal hallide)
Salinity - ideal specific gravity is 1.023, acceptable range is 1.020 - 1.025
Ph - ideal Ph is 8.2, acceptable range is 8.1 - 8.3
Current - moderate
Feeding - no special requirements due to symbiotic zooxanthellae algae.
Supplements - clams thrive with the addition of calcium supplements
Compatability - completely non-aggressive
Life Span - a well cared for specimen will live up to 10 years

Click on the species below for additional information.

Tridacna crocea, 
T.derasa, 
T.gigas, 
T.maxima, 
T.rosewateri, 
T.squamosa, 
T.trevora, 
Hippopus hippopus 
H.porcellanus.

Information on Bi-Valves

Thanks to Gerald Heslinga and Harbor Aquatics for the pictures