Whale TF, fish TF, bird TF, nut TF, merging/TFs: worm, turtle, chair, apple, wall
This is a fun first for me. Characters from two of my different story universes meet, as commissioned by bvw1979. He suggested the result of the formula and potions mixing, and it was an interesting vehicle to delve further into what exactly Gena the scientist has created.
And their adventure continues in a sequel to the story: