Fiji!

Let's get straight to the card:

Click to enlarge

Copied from the backside: "The pristine waters of Fiji's coral islands are home to a wide variety of fish and coral species. These amazing sights are normally easily accessed through the local resort facilities or by booking one of the many local tours."

I just hope the tourists don't get intimidated by the angry-looking fella on the left.

Stamp shows Sicyopus zosterophorum, a local fish.