The blue part of the image is an isopod-a small crustacean.
图片中的蓝色部分是一个等足类动物---一种小型的甲壳纲动物。
They use these to capture and tear apart their crustacean prey.
他们用它捕捉甲壳类的猎物，并且用它们去掉猎物的甲壳。
After a dozen years, the crustacean will grow to the size of a tractor tire.
十几年后，这种甲壳纲动物将长到拖拉机轮胎大小。
After a dozen years, the crustacean will grow to the size of a tractor tire.
十几年后，这种甲壳纲动物将长到拖拉机轮胎大小。
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