Octopuses, or octopi, or octopodes (all are correct plurals!), are extremely interesting creatures. They are quite clever, capable of solving puzzles and causing a good deal of trouble by escaping their tanks at aquariums to eat fish from other tanks. Octopuses are also anatomically interesting: some can change color, all have three hearts and blue blood, and 2/3 of their neurons are in their tentacles. Pretty amazing animals!
Octopus, 5″x5″, ink, and watercolor on illustration board