Environment: milieu / climate zone / depth range / distribution range
Reef-associated; brackish; depth range 0 - 35 m (Ref. 348). Tropical; 23°C - 30°C (Ref. 102835); 28°N - 37°S, 31°E - 128°W
Indo-Pacific: Egypt to Pitcairn Islands and Ogasawara, Japan to Lord Howe Island.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 6 - 13 cm Max length : 41.7 cm SHL male/unsexed; (Ref. 117184); common length : 25.0 cm SHL male/unsexed; (Ref. 348)
The mantle color is highly variable, ranging from bright blue to brown.
Collected for food and for the shell trade. Aquaculture trials have been done in 1998 (Ref. 348). Maximum depth from Ref. 75831. Found in coral reef flats in shallow areas (Ref. 799), reef areas of lagoons (Ref. 97298) and in intertidal areas (Ref. 75831). Mixotrophic - filter feeds and photosynthesizes via its zooxanthellae (Ref. 105208). Tridacnids derive their nutrition from uptake of dissolved matter through their epidermis and from their symbiotic zooanthella Symbiodinium microadriaticum (Ref. 107098). Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).
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. 120744)
CITES status (Ref. 108899)
Threat to humans
FAO(Aquaculture: production; | FishSource | Sea Around Us
Estimates of some properties based on models
): 24.8 - 29.3, mean 28.4 (based on 3421 cells).
Prior r = 0.49, 95% CL = 0.32 - 0.74, Based on 1 stock assessment.
Low vulnerability (25 of 100)