Amazon Sailfin Catfish
Species principle: Endurance Claim
Outlast the water.
Whoever sits out the bad season owns the good one.
Amazon Sailfin Catfish gulps air at the surface and absorbs oxygen through a modified stomach wall, survives out of water for over a day while damp, and holds bank tunnels through the dry season — so it remains in stretches of river that every other fish has been driven out of.