Jorge, While I agree with you completely about the ethical aspects of goading animals into violent confrontation for the amusement or "sport" of an audience, I think Don's little experiment is far removed from that scenario. He is investigating the natural feeding habits of a species (in spite of the light-hearted manner in which he is reporting the results). If you are going to keep an animal in captivity, you have to provide its natural food. Even some of those beautiful aquarium fishes require live food. The natural food of molluscivorous cones is molluscs. If they were not attacking and killing them in Don's aquarium, they would be attacking and killing them in the ocean. Regards, Paul M. Rhode Island, USA