Tekhelet - Fundamental Argument in favor of Murex trunculus

Baruch Sterman discusses the key argument in favor of Murex trunculus as a "kosher" source for tekhelet in tzitzit. He brings three halachic sources and three recent archeological finds that, taken together, build a very strong case for the position that the chilazon - the marine source of the ancient authentic tekhelet - is the trunculus snail.