Not a joke, just something very cool and amazing.....
Night-time dive near Hawaii, 2 divers were found by a bottle-nose dolphin and it started to swim around them over and over again. When looking closer, one of them discovered the reason for this strange behavior - the dolphin had a fishing line hooked around it, hindering its ability to swim.
https://www.youtube.com/embed/2gvgkHSyKFE