1/125 @ f25
I'd love to tell you I planned this shot but I got lucky. However you make your own luck and I sat in front of this ribbon eels hole for ages just shooting as it came into focus. Bit of vignette added in Lightroom and a boost to levels.
Shortlisted!

trying to get a portrate of a nudi, small depth of feild focusing just on the head.

Baby cuttle fish

1/125 @ f9.
This is one of the first photographs where I planned the shot before taking it. I side lit the rhinopias with TTL on one strobe and set the other strobe to 1/8 and put it above the subject.

"I Am Strong!" - Veined Octopus with Bodybuilder Pose - Puri Jati, Bali (Canon G9, Inon D2000w)

This Skeleton Shrimp (Caprella sp., size about 8mm) was very cooperating. It seems to say hello. :-)

Pygmy Seahorse (Hippocampus Bargabanti),
D300, 60mm AF-S Macro

A pair of scorpionfish out looking for food at night

This little threespot dascyllus (dascyllus trimaculatus), at the Wakatobi Marine Preserve in Indonesia was a ham, as she swam in front of my camera and posed for several minutes.

Leaf Scorpionfish (Taenianotus triacanthus) - Crystal Bay, Bali (Canon G9, Inon D2000)

Sangalaki Indonesia

...

Crynoids like sun beams...

Solenostomus paradoxus - Ornate ghost pipefish – Harlekin Geisterpfeifenfisch;
North-Sulawesi – Minahasa Lagoon;
Canon EOS 300D in Aquatica Housing

Stargazer.
D300, 60mm AF-S

Nice reef scene in Wakatobi

Proud Clown

Small Octopus (Octopus cyanea, about 4 cm) swims free in the night. Hard to get a focus on it. :-)
Shortlisted!

Flabellina rubrolineata nudibranch - SD, Nusa Penida, Bali (Canon G9, Inon D2000, UCL165)

Rhinopias aphanes - Lacy scorpionfish - Algenschluckspecht;
Bali - Tulamben;
Canon EOS 300D in Aquatica Housing

shy clownfish

Tiny Whip Coral Goby,
D300, 105VR

Why the long face? It is a new year Fuji S5 pro/105 VR

Tiny bubble coral goby

this was taken in Lembeh straights Dec 30th 2008 and is prime example of the amazing fish life in this area

i entered this only a copple oh hours before the end of the year so have re=entered it for this year thanks

Shrimp in Bubble Coral