Octopi are on 7 different episodes, and are #4 on Smarts, #2 on Moms, #4 on Venom, #1 on Disguise, #6 on Tough Babies, #3 on Poison, and #9 on Transformers. According to the episode Smarts, their brain is so big and so complex, that it rivals that of most birds and fish. Their 8 arms are filled with nerve cells that can teach the octopus, about the environment, and they are incredibly fast learners. Their entire lives are dedicated to learning, as everything they learn is entire self-taught. This is because the mom spends her entire time from the moment she lays the eggs to the moment they hatch guarding them from predators. She doesn't leave her post ever to eat anything. This is because she doesn't want predators eating her eggs. However though, by the time her eggs hatch the mother has lost all her energy and dies. This is why they are ranked high on the episode Moms, and also why they are also on Tough Babies, as they have to defend for themselves. The blue-ringed octopus is the size of a golf ball, but highly venomous. They can spit a cloud of toxic saliva or inject the venom in a bite, putting it on the episodes Venom and Poison. Octopi also can manipulate their bodies, and can control the size, shape, color and texture of their bodies to blend in to any surface to avoid predators like sharks. The mimic octopus can even disguise to look and act like flounders, sea snakes, and lionfish, making it into the episodes Disguise and Transformers.
- If following the countdown of extreme Smarts, here is a link to the next contender, which is the smartest animal in the sea that gives us an earful.
- If following the countdown of extreme Moms, here is a link to the final contender, which has to befall a horrible fate when giving birth to children.
- If following the countdown of extreme Venom, here is a link to the next contender, which is a killer that really came out of his shell.
- If following the countdown of extreme Tough Babies, here is a link to the next contender, which gets in terrible trouble if it doesn't get off mom's back.
- If following the countdown of extreme Poison, here is a link to the next contender, which contains poisonous bacteria that make a toxin so potent, it would make the octopus green with envy.
- If following the countdown of extreme Transformers, here is a link to the next contender, which squeezes through tight spaces underground.