https://blogs.scientificamerican.com/observations/the-last-of-the-ocean-wilderness/

The ocean covers more than 70 percent of our planet, an area of nearly 140 million square miles. It is so immense that explorers once thought there was no way to cross it. Once our ships were advanced enough to do so, naturalists then thought it impossible for humans to ever exhaust fisheries or drive marine species to extinction.

How we have proved them wrong.