Bulla ampulla (Linnaeus, 1758)
Pacific blue snail
臺灣棗螺
Bulla ampulla
photo by Batoy, Corazon B.

Family:  Bullidae (bubble shells)
Max. size:  5 cm TL (male/unsexed)
Environment:  benthic; marine; depth range 0 - 165 m
Distribution:  Indo-Pacific, Southeast Atlantic and the Mediterranean.
Diagnosis:   
Biology:  Assumed maximum length from Ref. 844. A strictly herbivorous species that is common on rocky reefs (Ref. 844), and always found around soft silt or mud in where it is usually buried (Ref. 866) during the day (Ref. 107294); common in deep rock pools and tidal swimming pools (Ref. 866). Nocturnal. Emerges at night to feed on seaweeds and grasses (Ref. 107294).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:  Known from Nan'ao, Yantian, and Hainan Island (Ref. 129192). C: Ref. 129192.

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