I used the A Muse skinny oval for this project, I also have these stencil sheets kicking around. If you don't have these you could also use a large circle punch as your guide.
I used the fine tip gelly roller pen in black. I tried at first to use the glaze pen but it smudged really bad. Trial and error!
This is the large SU oval punch.
To make the little waves on the top of the water I used my wave scissors and cut out cardstock and traced it onto my image.
Hope this was helpful for those of you who don't have a good fishbowl stamp!