Thanks for the beautiful view of the exploration under sea.
you must be having the best gift on handling the camera according to the neatness of the camera view of everything under the water.

According to the coral reefs under water, it seems that it is a big colony of these features and perhaps its like a constructed structure for such marine life to thrive in there and for easy collection due to an already constructed feature. Am still wondering the clogging on the walls of this massive marine structure on which such features get attracted and finally make it their final resting place.
Are the piers or columns used to support the entire structure or even serve the role of coral reefs to survive or for even more advanced roles because i see such features all attached to the columns?

This is astounding marine view and am still imagining so much about the way such pictures and videos can be shot in the marine world.