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Tridacna squamosa   Lamarck, 1819

Fluted giant clam

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Tridacna squamosa  AquaMaps  Data sources: GBIF OBIS
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Image of Tridacna squamosa (Fluted giant clam)
Tridacna squamosa
Picture by Batoy, Corazon B.

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Cardiida | Cardiidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthic; depth range 0 - 42 m (Ref. 117184).  Tropical; 31°N - 32°S, 30°E - 124°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

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)

Short description Morphology

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.

Biology     Glossary (e.g. epibenthic)

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).

Main reference References | Coordinator | Collaborators

SAUP Database. 2006. (Ref. 356)

IUCN Red List Status (Ref. 127697)

  Lower Risk: conservation dependent (LR/cd) ; Date assessed: 01 August 1996

CITES status (Ref. 108899)

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses

Fisheries: commercial
FAO - Aquaculture: production; | FishSource | Sea Around Us


More information

Common names
Egg development
Mass conversion

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(; publication : search) | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 25 - 29.3, mean 28.4 (based on 3457 cells).
Vulnerability (Ref. 71543): Moderate vulnerability (39 of 100).
Price category (Ref. 80766): Unknown.