Round 1 · strip 2 of 4 · Monday, November 9, 2026

At an aquarium, Nib tells Max that octopuses have three hearts and blue blood that uses copper. Max says that's a lot of valentines; Nib says good thing it has eight arms.
Comic · Animals

Heart to Heart to Heart

Real fact: Octopuses have three hearts: two pump blood through the gills and one pumps it to the rest of the body. Their blood is blue because it carries oxygen with a copper-based protein called hemocyanin.

Where this fact comes from