Honeycomb moray eel, Gymnothorax favagineus
Maze coral, Leptoria sp.
I came across this amazing juxtaposition of a honeycomb moray eel and a textured brain coral. It screamed monochrome to me, but one of the significant disadvantages of shooting under water is that you cannot just change your lens to suit the subject. Still, I slowly moved as close to the eel as possible, increased the depth of field, and adjusted my strobes to light up the coral and the eel.
Nikon D850, Nikonos 13mm RS, 1/200, f/16, ISO 400, Seacam housing, Ikelite 161s strobeby Tracey Jennings, United Kingdom/Malaysia