We are diving today at a depth of about 5,000 meters on the north side of Mona Seamount, which borders the southern edge of the Puerto Rico Trench.
We're not sure what to expect during this dive.
They almost look like columns.
Yeah, it looks like an underwater city or something.
Quite a bit of life here. This includes sponges and corals and some anemones.
Polynoid polychaete worms and a couple of fishes.
These depths are generally pretty poorly explored; some of the most unexplored on Earth.
Very few opportunities are available to actually get eyes on the seafloor below 4,000 meters or even 3,000 meters.