Robert Niles, left, with trainer Mike Price, shakes "hands" with Ferdinand.
Niles holds Ferdinand's flukes, as two other interaction participants watch.
Trainer Price, right, prompts Ferdinand to play a spitting trick on Niles.
Ferdinand responds to Niles' prompt, lifting himself out of the water.
Nanuq likes "pushing" games, said Price. Here, Niles pushes Nanuq back into the water.
Allua gives Niles a kiss. Okay, more of a head bump.
Niles says goodbye to Allua, after Allua nailed him with a good tail-splash soaking.
Niles, with Price, at the end of the interaction.