Top 10 Oldest Extant Animal Species on Earth

What are the ten oldest animal species on Earth according to The Mysterious World?

Source: HERE

Most of these are aquatic

Quiz by Etanna

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Last updated: February 4, 2018

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First submitted	February 3, 2018
Times taken	25

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	Years	Hint		Answer
1.	2.8 billion	The first ever microbe to produce oxygen via photosynthesis		Cyanobacteria
2.	580 million	A plant-like organism full of pores and channels		Sponge
3.	550 million	A softbodied animal with an umbrella-shaped bell and trailing tentacles		Jellyfish
4.	500 million	A marine mollusc with a shell in the shape of a whorl		Nautilus
5.	445 million	A marine arthropod		Horseshoe Crab
6.	360 million	A critically endangered deep sea fish	the Latimeria fish	Coelacanth
7.	200 million	A primitive bony fish whose eggs humans eat		Sturgeon
8.	200 million	A tiny crustacean		Horseshoe Shrimp
9.	150 million	A living fossil that looks like a sea dragon		Frilled Shark
10.	120 million	An insect discovered in the Amazon rain forest	"ants from Mars"	Martialis Huereka