Tarpon are difficult to get good shots of. First, they are often quite skittish. I spent 3-5 minutes approaching this guy. Moving slowly closer on a diagonal, not directly at him, while trying to keep my breathing rate and volume down in order to not generate a lot of exhalation bubbles. (I guess I could invest in a rebreather to fix that problem.) Plus looking straight ahead, and not at him, occasionally catching a glance out of the corner on my eye. And during the day tarpon on not out in the open they are hanging out in the shadows of ledges. So most of the light has to come your strobes. However, their large silvery scales are VERY reflective. A lot of trapon pictures look like a picture of a mirror with the strobes facing dirctly at the mirror. The trick is the kick the strobes out so most of the light falls outside the edges of the frame and the center of the frame is lit only with the edges of the cone of light from each strobe.
I knew I would only get one shot. When the strobes fire he will slowly move 10-15 feet away–and underwater that may a well be 2 football fields away.
The shooting metadata for this image is:
D200 with 12-24 @ 12mm
1/30 sec @ f/5.6 ISO 100 Ex Comp -2/3
Aperture Priority; 2 TTL strobes, normal sync