This is a television commercial by the Sea Shepherd. It is an appeal to stop finning sharks. Shark finning refers to the cruel practice of capturing sharks and slicing off their fins. Shark fins are a Chinese delicacy — they are the main ingredient in shark fin soup. Since shark meat isn’t worth the cost of transporting the massive shark bodies to market, the finless animals are thrown back into the water, alive. Without its fins, the shark cannot swim, so it sinks beneath the waves where it drowns in a watery grave.