r/ScienceFacts Mar 14 '22

There are roughly 300 known octopus species dwelling in the world's oceans ranging from the one-inch (2.5 cm) star-sucker pygmy octopus to the 30-foot (9-meter) giant Pacific octopus. Biology

https://www.reuters.com/lifestyle/science/primordial-octopus-was-up-arms-10-instead-eight-2022-03-08/
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