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Pelamis platura
''Pelamis platura'', commonly known as the yellow-bellied sea snake, yellowbelly sea snake, or pelagic sea snake, is a species of sea snake found in tropical oceanic waters around the world, excluding the Atlantic Ocean.
It is the only member of the genus ''Pelamis''.
==Description==
:''See snake scales for terminology used here''
The body of this snake is compressed, with the posterior less than half the diameter of the neck; the body scales are juxtaposed, subquadrangular in shape, and in 23–47 rows around the thickest part of the body; ventral scales, 264–406 in number, are very small and, if distinct, divided by a longitudinal groove, but usually are indistinguishable from adjacent body scales. The head is narrow, with an elongated snout; head shields are entire, nostrils are superior, and nasal shields are in contact with one another; the prefrontal scale is in contact with second upper labial; one or two preoculars, two or three postoculars, and two or three small anterior temporals are present; seven or eight upper labials are found, with four or five below the eye, but separated from the border by a subocular. Colors of the snake are variable, but most often distinctly bicolored, black above, yellow or brown below, with the dorsal and ventral colors sharply demarcated from one another; ventrally, there may be a series of black spots or bars on the yellow or brown background, or the yellow may extend dorsally so there is only a narrow middorsal black stripe, or a series of black crossbars (M.A. Smith, 1943: 476–477, gives more complete descriptions of the color pattern variants). Total length for males is up to , for females up to ; tail length for males is up to , females up to .
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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