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Tridacna derasa in a reef aquarium. The southern giant clam is classified as Vulnerable (VU) on the IUCN Red List, [1] and is listed on Appendix II of CITES. [13] The southern giant clam is a popular food item and aquarium species, and has therefore been hunted extensively throughout its natural habitat. [6]
By day, the clams spread out their mantle so that the algae receive the sunlight they need to photosynthesize, whereas the colour pigments protect the clam against excessive light and UV radiation. Adult clams can get most (70–100%) of their nutrients from the algae and the rest from filter feeding. [12] When disturbed, the clam closes its shell.
Care Level Description Max size Atlantic Thorny oyster: Spondylus americanus: Spondylus americanus: 10 cm (3.9 in) Bear paw clam: Hippopus hippopus: Blue clam, Boring clam: Tridacna crocea: Yes: 15 cm (5.9 in) China clam: Hippopus porcellanus: Electric flame scallop: Ctenoides ales: Yes: Flame scallop: Ctenoides scaber: Yes: 3 in (7.6 cm ...
Mantle of giant clam with light-sensitive spots, which detect danger and cause the clam to close. Tridacna gigas, the giant clam, is the best-known species of the giant clam genus Tridacna. Giant clams are the largest living bivalve molluscs. Several other species of "giant clam" in the genus Tridacna are often misidentified as Tridacna gigas.
The maxima clam (Tridacna maxima), also known as the small giant clam, is a species of bivalve mollusc found throughout the Indo-Pacific region. [3]They are much sought after in the aquarium trade, as their often striking coloration mimics that of the true giant clam; however, the maximas maintain a manageable size, with the shells of large specimens typically not exceeding 20 centimetres (7.9 ...
Tridacna crocea, the boring clam, crocus clam, crocea clam or saffron-coloured clam, is a species of bivalve in the family Cardiidae. It is native to the Indo-Pacific region. It is occasionally found in the aquarium trade [4] where it is often simply referred to as crocea. [5]
Sometimes the giant clams are still treated as a separate family Tridacnidae, [1] but modern phylogenetic analyses included them in the family Cardiidae as a subfamily. [2] [3] Two recent genera and eight species are known: Hippopus—2 species; Tridacna—10 species; Recent genetic evidence has shown them to be monophyletic sister taxa. [4]
Clam garden in the Broughton Archipelago. A clam garden (k’yuu kudhlk’aat’iija in the Haida language, [1] lux̌ʷxiwēys in the Kwakʼwala language [2]: 2 [3]) is a traditional Indigenous management system used principally by Coast Salish peoples.