Preheat oven to 350 degrees.
In a large bowl, add whole wheat flour, egg, and water. Mix until dough comes together.
Add spirulina powder and organic coconut oil. Continue mixing.
Form dough into a ball with your hands, making sure all ingredients are incorporated evenly. If dough feels too dry, add a little more water until it's soft and easy to work with.
On a lightly floured surface, cut out mermaid tails.
Place evenly spaced on a cookie sheet.
Bake 10-12 minutes or until treats are golden brown and crisp to the touch.
Allow mermaid tails to cool completely before treating your pup.
Store treats in an airtight container.