Believe it or not. But our planet is home to blue and green blooded animals, other then the usual carrying red blood. Why blue? Since these animals do not have red blood, they must have some other element flowing through their body right? Do you know, there secret element? Yes, it is copper. Hemocyanin is responsible for the blue colour of blood; it actually dissolves in blood plasma instead of being carried within red blood cells and gives the blood a bluish colour. Cuttlefish Cuttlefish is marine animal; it's a mollusk not a fish. Cuttlefish have an internal shell, eight arms and two tentacles with which they secure their prey. They eat small mollusks, crabs, shrimp, fish, octopuses and worms. Pillbug (Roly-Poly) Members of the roly-poly family can roll into a ball; this is a rare feature which they share with few other animals. It is this ability which gives pill bug their common name of roly polies or potato bugs. OctopusAn octopus has a hard beak, with its mouth at the center point of the arms. Octopuses have no internal or external skeleton, allowing them to squeeze through tight places. All octopuses are venomous, but only one group, the blue-ringed octopuses, is known to be deadly to humans. Emperor Scorpion The emperor scorpion is a species of scorpion native to Africa. It is one of the largest scorpions in the world and lives for 5-8 years. Its body is black, but glows under ultraviolet light.