How many feet does an octopus have?

Octopus's body is saccate and short round, and the boundary between head and body is not obvious. The head has a big compound eye and eight flexible wrists, and each wrist has two rows of fleshy suckers. Octopus is a kind of temperate mollusk, which is widely distributed in tropical and temperate waters all over the world, and mainly lives in caves and crevices on the rock bottom.