A coral head, or in Australia, a Bommie. Twenty four feet depth, 8m..
.A Blackbar Soldierfish. Red? Big eyes? He swims up in the water column at night to eat shrimps and little fish that go up there to eat whatever they eat. Big restaurant in the 'sky' at night, hey?
I think that's 'Ten Ray Star' coral above the fish, and to the right, that's Great Star coral, Montastraea cavernosa. The little fish are little fish, ha!
What's that tiny red thing? Up and right of the Christmas Tree Worm?
The purplish stuff is an algae called Reef Cement. It is very hard, calcarious, and cements dead corals together. And it provides a surface for new little coral polyps to settle and begin growing.
.Looking closely at the 'nothing' between corals. I see a little fish, and another fan worm. Both on the right.
OK, see you later! Thanks for stopping by!