There were predictable cries of protest from some conservationists who focus on charismatic megafauna when revised standards for use of the "dolphin safe" tuna label were announced by the Commerce Department in April. Though the new rules stipulate that no dolphins should be killed or seriously injured, they do let canners label their product "dolphin safe" even if tuna are caught using large, encircling nets that can snare dolphins. Charismatic megafauna at play. Photo: NOAA. The environmental community is split on the revised rules. Greenpeace and the Center for Marine Conservation, among other organizations, say the changes are needed to …