Theropod dinosaur vs decapod crustacean

On an unusually clement morning of the early(ish) 21st century. 
These have been at each other for donkey's years. Several millions of years. Well before the emergence of donkeys*
Yet we are deluded and short-sighted enough to dare clamour everywhere that we are the dominant species on this planet (the sharks and the jelly fish piss themselves laughing when they hear that one, then go on about floating around the oceans for a few more millions of years). 

I watched for a little while, transfixed. I knew that the crab didn't stand a chance. 

Neither do we. 


* the scientists place it somewhere between shit loads of millions of years and a large large amount of millions of years