Jonathan Bird's Blue World - Season 4 Season 6 Episode 9 Searching for the Rare Blind Crayfish + Odd Shark Behavior + Exquisite Leafy Seadragon

Blue World goes on a search for a rare blind crayfish. Then we investigate why Hammerhead sharks tend to swim at an angle...tilted to one side. This "side swimming" behavior has only recently been scientifically studied. Finally, Blue World heads down under, to South Australia, searching for the rarest seahorse in the world...the exquisite Leafy Seadragon!