A fearsome critter said to come around every spring. He has two tails like bass-drum sticks and swings them like lightning, beating on the tight drum-like skin on his back. when the fish hear this they all flock near the shore in shallow water and lay their eggs. They wouldn't know it was spawning season if they didn't hear the dum-dum. Then, after they lay their eggs they go away and the dum-dum keeps watch until all the little fish are hatched out.