- 匿名使用者1 0 年前最佳解答
Sea Turtle, common name for a group of marine turtles having streamlined shells and limbs modified into paddlelike flippers. The loggerhead and the olive ridley sea turtles have true, but loosely attached, carapaces (upper shells) and plastrons (lower shells). The leatherback turtle lacks a solid, bony carapace and is the only living turtle to have free ribs and vertebrae. The green turtle, which is named for the color of its fat, is much hunted for market. The hawksbill has also been hunted for its shell and has been classified as a threatened species.參考資料： Microsoft ® Encarta ® 2006. c 1993-2005 Microsoft Corporation. All rights reserved.
- winniLv 51 0 年前
Sea turtles, air-breathing reptiles with streamlined bodies and large flippers, are well adapted to life in the marine environment. They inhabit tropical and subtropical ocean waters throughout the world. Of the seven species of sea turtles, six are found in U.S. waters: loggerhead, leatherback, green, hawksbill, Kemp's ridley, and olive ridley. Although sea turtles live most of their lives in the ocean, adult females must return to beaches on land to lay their eggs. They often migrate long distances between foraging grounds and nesting beaches.