Grey Tilefish

Found singly, in deep waters, over mud and rubble bottoms, on upper slopes of the outer continental shelf.
They dig into the substrate for small fish and benthic invertebrates.

Tilefish form undersea Pueblo villages made from gravel or sand substrate these self-made burrows and caves are at the base of reefs or piles of rock, often in canyons or at the edge of steep slopes.
If disturbed they quickly dive head-first into their constructed retreats.