Wetpixel user Marjo has created a home-made ringflash using see-through plastic kitchenware, a reflective car window solar protector, and one large roll of duct tape.
I think the contraption did end up looking more like a gas mask than a ringflash, so I am sure it will come to some strange adn wonderful use even if it might fail in it original purpose.
Perhaps the refective intertior could serve as a barracuda attractant. Well see, but if I use it for actually photographing fish, I will surely post the images here.
We look forward to the underwater images! In the meantime, click through to see photos of the project.