Nerita exuvia Linnaeus, 1758
Snake's skin nerite
sihi,  Snake's skin nerite,  bag-ang bag-ang,  ragas-ragas,  snakeskin nerite,  tungkaka
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Family:  Neritidae (nerites)
Max. size:  4 cm ShL (male/unsexed)
Environment:  benthic; marine
Distribution:  Western Pacific.
Diagnosis:  Shell ovate and thick, flatly excavated at the base. Spire small, whorls narrowly rounded with spiral ribs separated by grooves. Columella widely concave, granulated and toothed. Colouration: ribs blue-black, marked with white lines, grooves whitish, spotted with blue black (Ref. 128042).
Biology:  Collected by gleaning for its edible flesh (Ref. 128042). Length based on occurrence data; to be replaced with better reference. Abundant in rocky shores, forming dense colonies in upper mid-tidal pools, on wet submerged rocks and in crevices. Also found in intertidal areas (Ref. 128042).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:  Known throughout the Philippines (Ref. 821). Reported from Nabas, Aklan, where is it collected by cleaning for the edible flesh (Ref. 128042). C: Ref. 821, 128042; O: Refs. 821, 86518.

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