Here's the link to the sound itself:
http://www.pmel.noaa.gov/vents/acoustics/sounds/bloop.htmlI think it's pretty interesting. Kutulu? Probably not... although possibly a creature who inspired that mythos. There are more things in nature that we have not discovered, especially in the deepest parts of the ocean. There are creatures that live in the depths and never come up beyond a certain point - so until we're able to go there safely and take a look around, we'll never know what's there. For that matter, there's still an element of luck involved - the ocean floor is more vast than the dry land we walk on, and we are still discovering new things on dry land. So, it's not inconceivable that we might find some enormous 'sea monster'. It will probably die if/when we bring it up to the surface. Or for that matter, we might have to engineer new technology to even do something like that. When we're talking about Kutulu and other such 'outer' beings - their very existence is in defiance of reality, so I doubt we'll find them lurking on the ocean floor in our physical space.
I do hope they'll find the source of the noise, though, because that will probably be a really fascinating find, whatever it is.
peace