r/interestingasfuck • u/DearEmphasis4488 • 2d ago

Animals sleep time

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13.1k Upvotes

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u/ElegantHope 2d ago

"Fish" What kind of fish? because there's thousands of species and Sharks are included in that

56

u/Maultaschtyrann 2d ago

It's WAY more than thousands. Considering they are BY FAR the oldest type of animal, they evolved in different directions for billions of years

42

u/Educational-Data1270 2d ago

Oldest vertebrate*. And they’ve been evolving since the Cambrian period, so earliest they appeared would be 540 mya

6

u/Maultaschtyrann 2d ago

I was referring to the animals shown in the video, but in hindsight this wasn't clear. And yeah, I apparently somewhat overestimated that time span :D

7

u/Educational-Data1270 2d ago

No worries. Merely helping to set the fact straight, not having a dig at you or anything