Near Kona, Hawaii, a group of divers who were watching manta rays at night came across a dolphin that had fishing line and a hook stuck on one of its fins. The divers, who say the dolphin seemed to have been asking for help, were unable to remove the hook, but managed to remove some of the fishing line.
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MantaRaysHawaii: http://youtu.be/CCXx2bNk6UA