Comments

That was a dolphin that was not likely affected by the explosion. Consider that dolphin have a single dorsal fin that breaks the water's surface. Sharks have both dorsal and caudal fins that point upward and are likely to break the surface. Plus, consider that sharks are more likely to cruise at the surface for longer periods, while dolphins tend to come up and go down quickly for air. These are somewhat generalizations, but they hold true in this case.