All octopuses are venomous. Their venom contains enzymes that help digest their food.[octopus]
The plural of octopus is not octopi because the word is Greek "octopous," not Latin. The Greek plural would be octopodes, but scientists refer to them as octopuses.[octopus]
Some octopuses can walk—and even run—on land. According to one veterinarian, chasing an octopus on land is like "chasing a cat."[octopus]
All octopuses have short life spans. The longest living octopus only lives three to four years. Most of the smaller octopuses live for 6 months to a year.[octopus]
An octopus can regrow its arms. They can regenerate without any loss of function, unlike when a lizard loses its tail.[octopus]
Because the octopus's oxygen-carrying pigment (hemocyanin) isn't as efficient as hemoglobin, the octopus has evolved two accessory hearts.[octopus]
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