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Emydocephalus annulatus
''Emydocephalus annulatus'', commonly known as the turtle-headed sea snake or egg-eating sea snake, is a venomous species of sea snake〔 that can be found in waters of Oceania near Australia and some Pacific Islands like the Philippines and the Loyalty Islands of New Caledonia. The geographic range is sporadic, for example, with populations distributed in the Eastern and Western coasts of Australia in the Great Barrier Reef and the Timor Sea reefs respectively. They do not, however, occur in the Gulf of Carpentaria along the North coast.〔(Emydocephalus annulatus ) (2010). ''The IUCN Red List of Threatened Species''. International Union for Conservation of Nature.〕
==Description==
Named for its short, blunt head, this medium-sized snake has a slender build and varies in color. A single snake may exhibit only one color or may have banded patterns of white or yellow with dark rings. The scales on top of the head are large, regular, and entire. The rostral scale on the tip of the snout is conical in shape, and the second of three supralabial scales is the largest. The body has 15–17 rows of smooth, overlapping scales. It has 125–145 ventral scales, a single anal scale, and 20–33 single subcaudal scales.〔(''Emydocephalus annulatus'' - Turtle-headed Seasnake ). ''Department of the Environment''. Australian Government.〕 It may grow to in length.〔
A recent study suggests that an individual snake's color affects the amount of algal fouling that accumulates on its body. A snake of a darker, more monotonous color will have a higher amount of algae build-up than those of a paler, patterned variety. The added weight of algae affects an individual's speed, reducing it by 20%. It was observed that those whose locomotive skills were affected had a tendency to be more inactive and choose to hide among the coral, while those with little to no algal fouling were found actively foraging. The inactivity, however, did not affect their survival rates as the study did not find significant evidence that lighter-colored snakes were more likely to survive than their darker-colored counterparts.
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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