the.com/octopus

a three-hearted alien wearing a tasteful disguise as ocean wildlife

means A soft-bodied sea creature with eight arms, a bulbous head, and a famously clever brain, found in oceans worldwide.

from From Greek 'oktopous,' literally 'eight-foot' — 'okto' (eight) plus 'pous' (foot), a cousin of the Latin 'pes' and English 'foot.' The much-debated plural 'octopi' is a well-meaning mistake: it slaps a Latin ending onto a Greek word. Sticklers prefer 'octopuses,' while the truly devoted reach for the Greek-faithful 'octopodes.'

brain count: nine brains, one central and eight in the arms
blood color: blue, thanks to copper-based hemocyanin
escape artist: can squeeze through any gap bigger than its beak
skin vision: skin can sense light without using the eyes
grim fact: mothers starve to death guarding their eggs

for instance

paul the octopus — german aquarium octopus correctly predicted 8 out of 8 matches at 2010 fifa world cup

inky the octopus — new zealand aquarium octopus escaped through a small gap in 2016, crossing wet floor to ocean

giant pacific octopus — species found in north pacific, largest octopus ever recorded weighed 600 lbs at seattle aquarium