Batissa violacea (Lamarck, 1806)
Violet batissa
photo by FAO

Family:  Cyrenidae ()
Max. size:  15 cm SHL (male/unsexed)
Environment:  benthic; freshwater; brackish
Distribution:  Western Central Pacific.
Diagnosis:   
Biology:  Locally collected for food (Ref. 348). Author and year is (Lamarck, 1818) in Ref. 3477. Also found in the banks and river beds, in fresh and brackish, often running water. Often lays buried with the hind tip of the shell emerging at the surface of the sediment with siphons slightly projecting between the valve margins. Capable of living deep within the sediment, with no siphonal access to the surface, to endure drought periods, then feeding from subterranean water through a narrow anterior gape of shell (Ref. 348).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans:  harmless
Country info:   
 

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