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脊椎动物 |
An Animal which has a spinal column.
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两栖动物 | A cold-blooded, smooth-skinned Vertebrate which characteristically hatches as an aquatic larva, breathing by gills. When mature, the Amphibian breathes with Lungs. |
| | 鱼 | A cold-blooded aquatic Vertebrate characterized by fins and breathing by gills. Included here are Fish having either a bony skeleton, such as a perch, or a cartilaginous skeleton, such as a shark. Also included are those Fish lacking a jaw, such as a lamprey or hagfish. |
| | 爬虫类 | A ColdBloodedVertebrate having an external covering of scales or horny plates. Reptiles breathe by means of Lungs and generally lay eggs. |