ភាគច្រើន​សត្វ​លើ​លោក តែងតែមានភាពខុសគ្នា ​​ទាំងរូបរាង​ និងពូជពង្ស របស់វា ។​ទន្ទឹម​ជាមួយនឹងគ្នានេះដែរ ក៏មាន​មនុស្សភាគច្រើនមិនសូវបានឃើញ​សត្វ​ដ៏កម្រ ដែល​មិនងាយស្រួល​ឃើញ​ដូច​ពីមុន​ឡើយ​។​
ខាង​ក្រោមនេះ​ជា​ប្រភេទសត្វ​ ​ប្លែក​ៗ​នៅលើភពផែនដី ដែលកម្ររ​និង​ឃើញ ៖​
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