🌊🐚 Meet the mesmerizing chambered nautilus—a "living fossil" that's been cruising the oceans for hundreds of millions of years! Unlike its octopus and squid relatives, this cephalopod sports a stunning, spiraled shell. Chambers in this shell allow the nautilus to pump air in and out, creating propulsions that let it accelerate backwards and turn around. 🔄 Learn more about these curious cephalopods with our online Marine Life Encyclopedia. Link in bio. #AnimalsAtoZ #MarineLife #OceanAnimals #ChamberedNautilus #Nautilus #Cephalopod