This story was verified by the Sea Shepherd Society. It's been around for a while, but I just found it. I love stories like this:
The famous Italian diver Enzo Maiorca was diving in the sea near Syracuse with his daughter Rossana, who was on the boat. As he descended, he felt something lightly hit him on the back. He turned and saw a dolphin. Then I realized that he did not want to play, but said something.
The animal dived and Enzo followed. At a depth of about 12 feet, there was another dolphin caught in an abandoned net. Mallorca quickly asked his daughter to give him a diving knife. In a few minutes, they managed to free the dolphin, which, with the last of his strength, let out an ′′almost human cry′′ (as Mallorca himself put it). A dolphin can survive under water for up to 10 minutes, then it sinks. The freed, still dazed dolphin Enzo, Rossan and another dolphin were brought to the surface. And then it suddenly turned out: it was a dolphin, who soon gave birth to a dolphin.
Dolphin - father made a circle, swam up to Enzo, touched his cheek (like a kiss) - a gesture of gratitude... and swam away.
After all that had happened, Enzo said: "until a person learns to respect nature and talk to the animal world, he will never know his true role on Earth.