Octopuses have three hearts, blue blood, and neurons in their arms, so each arm can taste, touch, and react somewhat on its own. Two hearts pump blood to the gills; the third pumps it to the rest of the body. That third heart actually stops when they swim, which is one reason they prefer crawling.
Octopuses have three hearts, blue blood, and a nervous system so distributed that each arm can taste, touch, and partly decide what to do without asking the brain first.
Two hearts pump blood to the gills; the third handles the rest of the body. When an octopus swims, that third heart stops, which is one reason they prefer crawling.
Octopuses have three hearts, blue blood, and can taste with their arms.
Two hearts pump blood to the gills; the third pumps it to the rest of the body. That third heart actually stops when they swim, which is one reason they prefer crawling. Their blood is blue because it uses copper-based hemocyanin instead of iron-based hemoglobin, and each arm has its own mini-nervous system, so an arm can keep reacting even after it’s been severed.