I would add to the list areas where boats and ships can not go. I’m aware that seems like the national parks for fish, but in these areas there would be no human interactions at all no humans vists, no human interactions of any kind. These would be used for the most endangered species and set up around their spawning sites. This would also might have a positive impact on the surrounding ecosystem as well.
This is an interesting idea. I think having areas where boat traffic was limited or banned could help species that require certain conditions to reproduce or are heavily impacted by such traffic. However, managing these areas to make sure boats are avoiding them would be tricky, especially if it made a boats travel out of their way to reach certain destinations.