At the Institute for Marine Mammal Research (Mississippi), scientists have taught dolphins to change any rubbish within the pool for fish. This is how the animals helped to maintain the pool clear. Dolphin Kelly started to make use of this technique for her personal functions. Realizing that for any piece of paper, no matter its dimension, she will get the identical quantity of fish, she started to cover the paper underneath the rock and tear off small items from it in change for fish.
Kelly didn’t cease there. One day she caught a seagull flying into the pool and bought numerous fish for it – the seagull was large. Then Kelly stopped instantly consuming all of the fish and commenced to make provides with which she lured new seagulls. And then she taught the opposite dolphins this trick, they usually all started to hunt seagulls too.