"Snow and his co-workers concluded that elasmobranchs lack the neuronal machinery absolutely essential for the perception of pain."
http://www.elasmo-research.org/education/topics/s_pain.htm
At best this shows that shark pain perception has a different neurological basis to humans. We still have no idea what sharks do and don't "feel".
At best this shows that shark pain perception has a different neurological basis to humans. We still have no idea what sharks do and don't "feel".