I did this yesterday on the last day of a migraine. I shamefully looked at http://www.bigtrout.com/graphics/fish3.jpg. I’ve got to stop myself from doing that. I didn’t check to see the rights to that fish. 🙁
This is thin gouache.
Might I add, that I’ve settled on adding about 30% by volume peach gum solution to the pigment paste for gouache, about 25% for watercolor. Recipes are all wildly different.