It's not specifically related to climate change, but I think this Surfrider campaign illustrates their message in a powerful way. The contrast of the delicate foodstuff with waste is a visceral reminder of the contamination of seafood. I have a feeling that the image might well come back to haunt you just before tucking into that plate of sushi you've just ordered... Although this "disgust" reaction might be more effective at stopping people from eating seafood, rather than their intended "call to action" (look at this website).
