Rita, I'm guessing you're referring to this tag.
My underwater tag was made
basically the same way that I made
Hollywood Fireworks.
The underwater tag does not have a motion trail, the edging around the letters is different, and I used a different font, but the basic steps of removing the excess background are the same as from the
Hollywood Fireworks Tutorial.
If there is anything specific about my underwater tag that you're interested in learning, then let me know, and I can write up some quickie notes and post them on the board as a challenge.