Mimic octpus,Thaumoctopus mimicus. "This animal is so intelligent that it is able to discern which dangerous sea creature to impersonate that will present the greatest threat to its current possible predator. For example, scientists observed that when the octopus was attacked by territorial damselfishes, it mimicked the banded sea snake, a known predator of damselfishes."
Monarch Opal. So, natural opal is nano particles of silica dioxide. Almost as small as atoms. It took 20+ yrs of research to patent this process that perfectly mimics mother nature. The colors are unreal!!
Suchomimus ("crocodile mimic") is a genus of large spinosaurid dinosaur with a crocodile-like mouth that lived between 121–112 million years ago, during the late Aptian stage of the Cretaceous period in Africa.Cast of the skull, Dinosaur Discovery Museum