Leafy Seadragon

This is called a leafy seadragon, Phycodurus eques, and is a marine fish in the family Syngnathidae, which also includes the seahorses. There are a number of particular challenges in taking pictures in a large aquarium. Flash photography is out because of the possible reflections from the glass. It is also difficult because fish don't usually sit still so their photo can be taken. The low light conditions make it hard to stop movement with a slow shutter speed. I don't usually even try to take pictures under these conditions, but this one seemed to work.