问题补充：
答案：
海豹是对鳍足亚目种海豹科动物的统称。海豹体粗圆呈纺锤形。全身披短毛，背部蓝灰色，腹部乳黄色，带有蓝黑色斑点。头近圆形，眼大而圆，无外耳廓，吻短而宽，上唇触须长而粗硬，呈念珠状。四肢均具5趾，趾间有蹼，形成鳍状肢，具锋利爪。后鳍肢大，向后延伸，尾短小而扁平。毛色随年龄变化：幼兽色深，成兽色浅。
Seals is a pinniped suborder Phocidae animal species collectively. Cuyuan fusiform body seals. All wearing short-haired, blue-gray back, abdomen cream with blue-black spots. Head nearly round, large round eyes, no external ear, kiss short and wide, stiff upper lip and long tentacles, was beaded. Both limbs with five toes, webbed toes, forming flippers, with sharp claws. After the big flippers, extends back, tail short and flat. Coat color changes with age: Cubs color depth, into animal coloration.
