I tend not to think cryptid when I look at aquatic life, but rather unrecorded species simply because we only know like 20% of whats under the water.
This 'muck monster' is obviously some type of fish, whale or other marine animal.
The video is not clear enough to make out what sort of animal it might be though. From the way it's swimming, I would say it's something that needs
to surface to breathe, the nose is probably breaking the surface. Could be a gator, turtle or something like that.



