Like something out of a superhero comic, the spotted salamanders embryos run off of solar energy. Algae lives in the embryonic cells. Vertebrates usually destroy any foreign materials in the body but in this case, the animal and alga relationship is symbiotic. The embryonic salamander metabolizes oxygen and makes carbon dioxide that feeds the algae. In exchange, the alga makes oxygen and glucose that feeds the little salamander. Spotted salamanders also prove human inferiority because of their ability to regenerate limbs, parts of its brain, and other organs. It also has better defences than humans, secreting a toxic milky substance that tastes bitter to predators. Regeneration and poison? That's a pretty neat trick, slimy little dude.
