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Hydrophis viperinus : ウィキペディア英語版 | Hydrophis viperinus
Viperine Sea Snake, ''Hydrophis viperinus'', is a species of Elapidae (Hydrophiinae-sea snake) and ''Thalassophina viperina'' is its synonym. It is thought to be naturally rare but widespread.〔 It is venomous. ==Diagnostic Characters== Scales hexagonal, juxtaposed, in 27-34 rows on the neck, 37-50 at midbody; ventrals 226-274, anteriorly about half the width of the body, narrowing posterior to about twice the width of the adjacent scales, or slightly less; head shields entire, nostrils superior, nasal shields in contact with one another; prefrontals longer than broad, not in contact with upper labials; 1, rarely 2, pre- and 1-2 postoculars; 7-9 upper labials, 3-5 bordering eye (sometimes only 3-4 or 4-5); usually 1 anterior temporal, occasionally 2 or 3; body color, more or less bicolored, gray above, white below, the 2 usually clearly demarked on the sides, often with 25-35 dark rhomboidal spots, rarely with dark bands. Total length males 925 mm, females 820 mm; tail length males 100 mm, females 80 mm.
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