Close attendance: Kathryn gets into a bit of a spin as the turtle pays her a little too much attention
And all was going swimmingly as they processed arm-in-arm through the aquarium, surrounded by turtles, cow-nose rays and shoals of colourful tropical fish.
But not everyone was blissfully happy as the enormous turtle turned party-pooper and waded into the action, sinking his teeth into the bride's flowing gown, which was tucked beneath her breathing apparatus, and then tried to drag her away.
James, nattily dressed in sea blue tie, paddled to his bride's rescue and and the giant of the deep eventually turned...er...turtle.