Bivalvia | Cardiida
Environment: milieu / climate zone / depth range / distribution range
Benthic; depth range 0 - 42 m (Ref. 117184). Tropical; 31°N - 32°S, 30°E - 124°W
Indo-Pacific: from East Africa to the Red Sea, (but not the Persian Gulf) to as far east as Pitcairn Islands, north to southern Japan, and south to Queensland, Australia and New Caledonia. Introduced in Hawaii and Guam.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 16 - 20 cm Max length : 45.0 cm SHL male/unsexed; (Ref. 95990); common length : 30.0 cm SHL male/unsexed; (Ref. 348)
The species has an elongate shell with conspicuous fluted scales on its radial ridges. The valves are white and occasionally tinged with orange, and the mantle yellowish green.
Maximum depth from Ref. 87928. In eastern Polynesia, it is known to be restricted to deep water (Ref. 87928). Found in intertidal areas on corals (Ref. 75831). Abundant on outer reef slope (Ref. 2923). Also found in a lagoon (Ref. 87813), on sandy bottoms (Ref. 106695), rubble or in reef pockets (Ref. 2923). Unattached or weakly attached by byssus as an adult (Ref. 2923). Tridacnids derive their nutrition from uptake of dissolved matter through their epidermis and from their symbiotic zooanthella Symbiodinium microadriaticum (Ref. 107098).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).
SAUP Database. 2006. (Ref. 356)
IUCN Red List Status (Ref. 126983)
CITES status (Ref. 108899)
Threat to humans
FAO - Aquaculture: production; | FishSource | Sea Around Us
Estimates based on models
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.08-0.23; tm=4).
): 25 - 29.3, mean 28.4 (based on 3457 cells).
Moderate vulnerability (39 of 100).
Nutrients: Calcium = 149 [71, 228] mg/100g; Iron = 8.53 [1.95, 15.11] mg/100g; Protein = 9.88 [8.64, 11.12] %; Omega3 = 0.313 [0.202, 0.423] g/100g; Selenium = 61 [50, 72] μg/100g; VitaminA = 0 μg/100g; Zinc = 2.04 [0.56, 3.51] mg/100g (wet weight).