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Science

How big is the smallest animal?

2 Answers

Myxozoa, an aquatic parasite, can be as small as 10 micrometers, about the size of a human red blood cell

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The smallest vertebrate (animal with a backbone) is Paedophryne amauensis. The body length of an average adult is reported at less than 8 mm, about the size of a pea. The smallest invertebrate is the rotifer, or wheel animal, which can be as small as 50 microns, which is the equivalent of 0.05mm.

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