I want to believe. 

 

1. Tardigrade or "Water Bear" 

Source: marky6045

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Source: wired

2. Hydrothermal Worm

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Source: eldersignspress

3. Polynoidae or "Scale Worm"

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Source: dailymail

4. Maggots 

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Source: telegraph

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Source: eyeopening

5. Bacteriophage (Virus) 

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Source: dailymail