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Enhydrina schistosa
''Enhydrina schistosa'', commonly known as the beaked sea snake, hook-nosed sea snake, common sea snake, or the Valakadyn sea snake, is a highly venomous species of sea snake common throughout the tropical Indo-Pacific. This species is implicated in more than 50% of all bites caused by sea snakes, as well as the majority of envenomings and fatalities.
==Description==
The rostral scale is longer than broad, and is in contact with four shields; frontal more long than broad, shorter than the parietals; nasals in contact with the two anterior labials; sometimes partially divided; one pre- and one or two postoculars; temporals l–3; seven or eight upper labials, fourth or third and fourth entering the eye, the last sometimes divided; anterior chin-shields rather indistinct, separated. Scales with a tubercle or keel, in 50–70 rows; ventrals 230–314, slightly enlarged. The snake is usually uniformly dark grey above; sides and lower parts whitish. Young specimens olive or grey with black transverse bands, broadest in the middle. Length of head and body 1110 mm; tail 190 mm.〔Rooij, Nelly de 1917 Reptiles of the Indo-Australian archipelago. E J Brill〕
The name ''valakadyn'' is from the Malayalam and Tamil word ''Vala kadiyan'' meaning net biter.〔Smith, M. A. 1941. Fauna of British India. Reptilia and Batrachia.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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