Is Red Tide Harmful Long-term?

There is little information about the long term impact of red tide. If people knew the true long term impact, they might be scared away from coasts. Property values would plummet, and places like Florida would lose much of its tax base.

Instead, red tide continues to be ignored. At best, it is studied or talked about, but no meaningful action is taken. Simple things like restricting fertilizers and chemicals on the lawns of people living near the coasts is far too controversial. If the simple, easy to achieve things will not be done, then it is unrealistic that anything else will be done except more talk. 

Red tide kills fish. Red tide kills sea snakes. Red tide kills sea turtles. Red tide kills manatees. Red tide kills dolphins. Red tide kills other marine animals. Red tide kills birds. 

Does anyone honestly believe that red tide - a killer of hardy birds, sea turtles, mammals, fish and other marine life - has no long term harmful effects?