nomads swarming a food source (WATCH AT 2x SPEED) 

nomads are some stable predators I engineered and then evolved in the evolution simulator The Bibites.
They are able to hunt those big whales but they still prefer eating stray meat pellets over hunting if possible. The nomads have optimized their behavior over thousands of generations (more than 200 real-life hours of evolution) and thought it was funny how they ruthlessly attack any meat that I drop into the sim.