As a general rule most mice are not big on swimming, and there are some good reasons for that. Due to their small size it is very easy for them to get hypothermia even in fairly mild conditions. While they possess great strength for their size it is easy to be swept away by waves and currents. Finally, any natural body of water that is big really enough to explore can have something that can eat you! Petina and Jackie are not the general rule.
This shot was done as promotional ad for the brothel that both Petina and Jackie worked for, and was shot down in the Cayman Islands. The depth is only about eight feet over one of the reefs. What you can't see is the portable dive/ air chamber that is a few feet out of camera view, or the several bigum scuba divers that are just out of sight that have checked to make certain that no Moray Eel is going to suddenly come out of the coral grottos eat one of the ladies. The divers are also watching in case some grouper or barracuda thinks the gals would make a sweet little snack. All in all the girls had a ball doing the shoot.
This was the first time I'd done an underwater scene in color and making both the characters and background look like thwy were underwater took some research. Image size 14"x 17". Medium color pencil, gouache , and some marker and micron pen.