OCTOPUSES

Octopuses are ocean creatures that are most famous for having eight arms and bulbous heads. Some other facts: They have three hearts and blue blood, thwy squirt ink to deter predators, and being boneless, they can squeeze into tight spaces.

Their skin is filled with a pigment called chromatophores allow an octopus's skin to change color. The octopus can also alter the shape of tiny bumps on its skin to change its texture.