Animals SuperUser Account Wednesday, August 19, 2026 2 337 The Octopus: One of the Ocean’s Most Intelligent Animals The octopus is one of the strangest and most fascinating creatures in the ocean. With eight flexible arms, three hearts, extraordinary camouflage abilities, and remarkable intelligence, octopuses seem almost unlike any other animal on Earth. They belong to a group of marine animals known as cephalopods, which also includes squid and cuttlefish. Hundreds of octopus species live throughout the world's oceans, from shallow coral reefs to deep underwater environments. Read more