The octopus is a soft-bodied creature of the deep. Its can quickly change its body’s shape to squeeze through the tiniest gaps. They have 8 limbs, two eyes and a beak. These intelligent beings are very stealthy and are often thought of as one of the creepy creatures of the deep sea. Even more creepy is the Cthulhu. Invented by H.P. Lovecraft in 1928, the Cthulhu is an octopus-like monster of the deep who resembles a mix of the octopus, dragon and a human.