Bivalvia |
Arcida |
Arcidae
Environment: milieu / climate zone / depth range / distribution range
Ecology
Benthic; depth range 0 - 20 m (Ref. 348). Tropical
Indo-Pacific: East Africa to Red Sea and Polynesia.
Length at first maturity / Size / Weight / Age
Maturity: Lm ? range ? - ? cm Max length : 9.0 cm TL male/unsexed; (Ref. 348); common length : 7.0 cm TL male/unsexed; (Ref. 348)
Shell equivalve, thick and inflated, very inequilateral, posteriorly expanded. Shape somewhat irregular, elongate rectangular in outline, with strongly protruding umbones anteriorly and a broad rounded keel from umbones to posteroventral margin. Posterior margin obliquely truncate, ventral margin slightly sinuous with a well-developed byssal gape. Cardinal area wide and riblets crossed by irregular growth marks, and a few larger radial ribs on posterodorsal slope. Periostracum coarsely pilose, mainly persisting towards shell margins. Hinge straight very long and narrow. Internal margins smooth. Colour: Outside of shell often encrusted with marine growths; posterior half dark brown, anterior half creamy white with zebra-like brown stripes. Inner side more or less strongly tinged with dark brown.
Found in reef areas of lagoons (Ref. 97298). Fixed on rocks, corals, or under stones. Littoral to sublittoral waters to a depth of 20 m (Ref. 348).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Members of the class Bivalvia are mostly gonochoric, some are protandric hermaphrodites. Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam.
Poutiers, J.M. 1998. (Ref. 348)
IUCN Red List Status (Ref. 130435)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial
| FishSource |
Tools
Internet sources
Estimates based on models
Preferred temperature
(Ref.
115969): 24.2 - 29.2, mean 28 (based on 4316 cells).
Resilience
Low, minimum population doubling time 4.5 - 14 years (K=0.06).
Vulnerability
High vulnerability (58 of 100).
