If you crossed a hedgehog with a fish, you'd get a puffer fish. This majestic, inflatable sea beast is one of the most unusual aquatic animals ever, with a unique set of defense mechanisms that ...

The smile of a starry puffer, Arothron stellatus ... Scientists found that it takes a lot of energy for the fish to inflate, as shown by a five-hour recovery period post-puff. ‘Swimming while inflated ...