<human>: Can you condense the text into a few key points?

I was reading about the bloop tonight (after finding [this comment] and got into a discussion with my boyfriend about whether or not the origin of the sound could be biological (scientists have confirmed it has to be). His arguments are:

- A creature of the size necessary to create a 1000+ mile radius noise is far too large to exist without us knowing about it due to the breeding pool necessary to sustain a population in the same way that Bigfoot cannot exist because if it did, the necessary population to sustain the species would be easily noticeable due to the number of people looking for it.

- The size of a creature necessary to create that type of noise would consume way too much food to not be noticed in the context of the number of necessary specimens noted above. 

- It can't be mammalian in nature or we would see it surfacing for air (because there is shit for air down there), so it has to be a fish. Fish down that deep could not sustain internal body temperature and fish that live in deep waters are pretty small (angler fish).
<bot>: giant creatures need tons of food to live in those depths and would have to have a large population to sustain the species.