Even if a legal boater hits and injures a manatee, we want them to feel compelled to call in authorities to rescue the animal and not flee for fear of prosecution. Now if boaters are speeding in a slow zone, well, laws are there for that.
All a manatee needs, we have found, is a chance to get out of the way of an oncoming boat. We have scientific proof that manatees can sense a boat and attempt to move away. A fast boat doesn't give the slow moving animal an opportunity to get out of the way.