This is a map of coral species diversity. The dark purple area in the center is a region known as the "coral triangle". The black arrow and circle represent the general location where these photos were taken.
Ctenophores or "Comb Jellys", normally pelagic, were frequent and largely unwelcome visitors on most swims.
From Paul's Fav
An epaulette shark in labor!
On the reefs of the coral triangle, life exists in layers. Here, a blue crinoid (feather star) collects passing nutrients from atop a hard coral.
A scorpion fish rests on a boulder coral riddled with christmas tree worms.
This is some sort of filefish - it swims upside down in an attempt to look like leaf litter.
A banded sea krait - the snake with the most toxic venom.
Each batch of sargassum grass that floats on the surface is like a self-contained ecosystem. Juvenile reef fish, and those endemic to the grass use this habitat for both protection and predation.
A passing shower on the surface has little impact on the reef below.
Crinoid - I can't resist photographing them.
A Cornetfish tries to look inconspicuous.
Nudibranchs are soft-bodied, often colorful, and extremely toxic slug like creatures.
Pipefish hate the camera.