I accidentally came across a youtube video that records the
existence of Bimini Road-like rectacular and other shaped
slabs. Like the slabs associated with the Bimini Road, they
mostly separated by large gaps or runnels between the
individual blocks. Possibly by erosion within the shoreface
along fractures / joint in the rock as has been documented
in modern surf zones in beachrock.

They are not unique to the Bimni Road.

They are shown in the video "Snorkeling the Rocks South
of Bimini Sands, Bahamas 4K GoPro (Remnants of Old Marina!?)"
by Puckmaster124 [www.youtube.com]

Nice rectangular blocks can be seen at 6:25

It would be interesting to know the water depth of these stones.

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)