Alien Crab (2012)

When cataclysmic forces of nature wiped out the dinosaurs, only the monstrous and alien-like horseshoe crab survived. This one hour special follows the incredible journey of the horseshoe crab from the oceanic abyss to the beach, from its egg to adulthood and from its unchanged existence half-a-billion years ago to today.

Unfortunately the movie Alien Crab is not yet available on HBO Max.