Coastal Carolinians are very aware of the dangers of “pluff mud” that is exposed with the tidal extremes. The small coastal creeks and waterways are so inviting to small craft explorers and while the pluff mud may look firm, but it is dangerous for humans and pets. Recently a St. Bernard fell off a pier at low tide and was saved only by giving the dog a large flat cushion to climb upon. The experience left the frightened dog exhausted.

Kayakers trapped for hours in chest-deep mud as tide rose around them, NC rescuers say – The State
The State