There are a lot of smart creatures out there. Dolphins, elephants, and whales are smart. And there are some really smart birds. I know some really intelligent fish. But they cannot know what humans know and are incapable of inflicting as much damage.
Sylvia EarleSharks are beautiful animals, and if you're lucky enough to see lots of them, that means that you're in a healthy ocean. You should be afraid if you are in the ocean and don't see sharks.
Sylvia EarleIf you think the ocean isn't important, imagine Earth without it. Mars comes to mind. No ocean, no life support system.
Sylvia Earle