Thanks. Yeah, they are all Aiko3. As for the skins, Orkazoka's is pretty much an Orca freebie for Aiko that was available years ago, but the site it was on is gone now. Holly and Titanna use a modified version of the Orca texture as a blender map along with a bunch of different Poser material room nodes for the color and spots. Octia's skin is just made up of material room nodes.
I like how Octia is the only one who looks concerned that there's a shark right there. Orkazoka looks annoyed, Titanna is just letting it go by, and Holly is looking at it and thinking "Hmmm...maybe, if I was drunk enough..."