"An Octopus Is Amazing" Quiz
How many hearts does an octopus have?
It has 3 hearts, because they have blue blood. Octopuses have three hearts: one pumps blood around the body; the other two pump blood to the gills.
What color is octopus blood?
Octopuses have blue blood because the protein transporting oxygen in their blood, hemocyanin, contains copper, instead of iron
Octopuses belong to which group of animals?
Cephalopods. The cephalopods come in all sizes, from the tiny bobtail squids to the enormous giant squid.