It always saddens me to see this senseless killing of dolphins.
As much as I disagree with the capturing of dolphins for sale to aquariums and places like Sea World, I can at least understand that they are making money from doing that.
The killing of these animals, bottle nose dolphins have brains larger than humans, is a disgusting act. Dolphin meat contains very high levels of mercury and is toxic to eat, in many cases, it is being sold and passed off as whale meat to an unsuspecting public.
I think in the same way that Japan continues to slaughter whales, there is a certain arrogance, that they will not let the rest of the world dictate to them what is morally right. I think change will only occur when the people of Japan pressure their government to change.
If you have not seen the documentary, The Cove, I highly recommend it. There have been many reported instances of Dolphins saving humans from shark attacks.