This image was taken 17 May 2012 above the islands in the lagoon.
One male returned from a fishing expedition with a fish to present to the female as part of the courtship process. He landed, presented the fish and was immediately attacked by the other Tern. I guess possesion and jealousy do not solely exist in the human world. These two battled above the lagoon for about a minute after which time, they both parted and glided back down to the island.
If you can, try and get down to the Oysterbeds between now and August. It only gets more interesting when the chicks hatch and the pair have to feed those extra mouths.