I almost forgot! A bit of natural-history research today turned up the interesting fact that a lightning strike on water is very bad news for marine life in the immediate area, but the intensity of the electrical field dissipates fairly quickly, even though the water conducts it a long way. Fish seldom die, unless there's a direct hit, but they're often stunned for a bit. This works well for pelicans and seagulls, who can scoop up a meal of stunned fish right after a storm.
Lightning strikes on water are much worse news for human divers. High voltages and metal tanks full of pressurized oxygen . . . hmm. Not a good mix.
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