- Octopuses are highly intelligent. They are some of the only marine animals that are capable of problem solving and pattern recognition. Two-thirds of an octopus’ neurons are located along the length of its arms, rather than its brain!
- They have three hearts. Two hearts work to move blood through the octopus’ gills, while the third keeps circulation flowing through the organs. The organ heart stops beating when the octopus swims, which is why they prefer crawling to swimming.
- Octopuses have blue blood. To survive in the deep ocean, octopuses have a copper-based protein called hemocyanin, which turns its blood blue! This copper-based blood is efficient at transporting oxygen when water temperature is low and not much oxygen is available.
- Using pigment cells and specialized muscles in its skin, octopuses can match the colors, patterns and textures of its surroundings. This means they can hide from predators in plain sight!
- Octopuses use ink to defend themselves. When threatened, octopuses will release black ink to obscure the attacker's view, giving it time to swim away. The ink even contains a substance that interferes with a predator's sense of smell, making them harder to track.
Expand your knowledge of cephalopods by checking out these other great stories about them!