Crayfish are one of the most sought after animals in the sea; from the tropical Pacific to the cold North Sea fishing boats voyage out daily to clear their pots and gather their tasty catch.

But for all this demand surprisingly little is known of the life of the crayfish on the reef. Now for the first time we follow them as they go about their day to day business fighting over females, courting and warding off predators.

Even more curious are the crayfishes’ activities in the depths at the dead of night; followed by the never-before-seen release of larvae at dawn. We follow these larvae on their yearlong voyage at sea and then pick up the trail on the mysterious underwater marches of the adults.

Where do they come from and where do they go? A riddle we can now solve.