Meet Comet the Goldfish

Comet the goldfish may be the world's most intelligent fish after its owner, trained it to perform a range of aquatic activities. Comet can play football, basketball and even limbo dance under a bar. The genius of the water world can also play fetch with a hoop, slalom around a series of poles and push a rugby ball over a set of posts.

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Dr Pomerleau, 41, from Los Angeles, used a training technique called positive reinforcement to train Comet to perform the tricks.
This involves rewarding the fish with food when it successfully completes a task. Dr Pomerleau insisted there was nothing fishy about his claim, saying anyone can teach their pet to perform similar tricks.