This has gone off topic, unfortunately I'm part of the reason.
Back on track:
As of yet, there is no conclusive answer as to what the mysterious Bloop is. Some speculate it is an unknown species of marine life, an exceptionally enormous one.
You know, back before the age of motorized boats and ships there were more sea monster sightings. Of these, among the most iconic are those of the Kraken. Today we know that there are in fact giant squids which are estimated to grow to sixty feet from the tips of their head to the ends of their tentacles.
But that is not what the sailors of old described. What they did was of a giant octopus. A giant octopus is plausible, as it is typically a bottom dweller. So logically, a slow moving giant species of octopus may in fact be living on the ocean floor, miles beneath the surface. After all, the vast majority of the Earth's ocean has never had eyes laid on it by man.
Why are we humans cannibals? We live a parasitic lifestyle, slaughtering each other for our own benefit. We may primarily live a commensalistic relationship, but that is still a form of living only for ourselves. Rarely do we live in mutualism where can help each other grow and come closer together.