You gasp, touching your gills and realizing that you probably can't breath right now. You struggle to get back to the bathroom, which is thankfully connected to your bedroom. Once there, you turn the tap on the bathtub and pull yourself in. Water hits your skin, and more importantly your gills. You gasp over and over until the water fill the tub over your chest. You touch your gills, feeling them rise and fall with every breath. Your skin is so slippery, and soft. You examine the webbing between your fingers, noting how translucent it is. And then of course there's your new tail. Silvery-blue scales cover it, and some of your stomach. You touch your tail, and are surprised to find it's not the least bit slimy. Kind of smooth actually. The scales overlap each other seamlessly, and some part of you registers that this must make swimming easier.
"What the hell am I going to do now?" You think. You're stuck in the bathtub for the moment, as the second you exit you'll suffocate. Your tail twitches seemingly in annoyance, amusing you a bit. You'd be more interested in seeing what you can do with it if you weren't trapped in the bathtub.
"It's not like I can call someone for help. I'll end up dissected or something." You think, once again running a hand over your new appendage. But this time your hand runs over the slit were your genitals are hiding. Poking the opening, your fingers touch something you assume to be the head of your cock, and you feel a surge of lust. The slit parts, giving way for your dick, but not YOUR dick. This has been transformed along with the rest of you. Tapered to a point, it is sleek, pink, and quite large. Now fully erect, probably about a foot and a half. Your balls just emerge from your slit enough so that you can see that they are also fuller, and now encased in pale gray skin.
Grasping the base of your cock, another rush of adrenaline and arousal sweeps through your body. Though your body is strange and new, you can't stop from pleasuring yourself. It feels so good. Your phallus is more sensitive, and throbs with such intensity. You need this release. Your gills rapidly contract, as you grow closer and closer to your climax. Submerged in water, your hand easily glides up and down the length.
There's a tight clenching in your balls and then your cock erupts. Thick spurts of cum are ejected with such force, that it sprays up from under the water and onto your chest. Your tail flails around sporadically, sending water everywhere. You're no sure if there's sweat on your brow, or water. Based on the way your chest is heaving, you'd say sweat. You've never had such an intense orgasm before. Your entire body is tingling, and your tail is seemingly numb, immobile. Lying there in the bathtub, you remember that you're still stuck in the tub for the foreseeable future unless you think of some way out.