Coral reef in acrylics (wip)

One sixth of an oval canvas finished. 

all painted with a 1pt to 0,003pt brush. I think I may have lost my mind while painting.
Do you have a favorite fish, aquatic animal or coral/plant species you'd like to see in the painting? Please let me know!
Doesn't live in a reef? I'm not picky. (I'm the genius who painted a goldfish in a reef after all)