Reddit comments:

12 people have been to the moon--thousands of miles away from Earth--but only 3 people have been to the Mariana's Trench. It's weird to think about how we probably know less about the deep ocean than we do about space. Also, some of the inhabitants of this ecosystem are completely outlandish, such as the Angler fish, nautiluses, and kraken most likely.

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I thought it was really interesting how they compared deep water first to not so deep water fish and how different they really are. Also, I never really recognized the fact that fish could be becoming depleted from fishing because I always just thought they were reproducing continuously. This video has good visuals to show how over the years, there are less and less deep sea fish. This is due to the fact that they reproduce slower. It would be cool to see if there was a way to know, on average, how fast these fish reproduce to ensure that we do not take the fish out of the ocean before the have had the chance to reproduce. On a side note, I thought it was crazy/ counterintuitive that the fish facing a lot of pressure would actually have less solid insides (more water/ less bones) because you would think they should have the skeleton to fight the pressure but it is the opposite actually.

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I, too, was surprised at the rate in which fish repopulate. I guess I never really thought about it, but it makes sense. But the rate at which humans repopulate is examined here (which is SO cool!): http://www.worldometers.info/world-population/

How fish farms help the oceans:

http://pandawhale.com/post/64709/how-fish-farms-around-the-world-are-caring-for-the-ocean