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Pelagic Stingray (Pteroplatytrygon violacea)
| 제목: | Pelagic Stingray (Pteroplatytrygon violacea)
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촬영일: 2014:11:20 11:07:10
등록시간: 2014:11:20 21:36:21
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The pelagic stingray (Pteroplatytrygon violacea) is a species of stingray in the family Dasyatidae, and the sole member of its genus. It is characterized by the wedge-like shape of its pectoral fin disc, which is much wider than long, as well as by the pointed teeth in both sexes, whip-like tail with extremely long tail spine, and uniform violet to blue-green coloration. It generally reaches 59 cm in width. The pelagic stingray has a worldwide distribution in waters warmer than 19 °C, and migrates seasonally to spend the summer closer to the continental shelf and at higher latitudes. The only stingray that almost exclusively inhabits the open ocean, this species is typically found in surface waters down to a depth of 100 m. As a consequence of its midwater habits, its swimming style has evolved to feature more of a flapping motion of the pectoral fins, as opposed to the disc margin undulations used by other, bottom-dwelling stingrays. |
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동물그림창고 똑똑전화 누리집
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