They're peaceful fish that consume algae and veggies, with colours that blow other fish out on the drinking water. Graphic Editorial Credit: Wikimedia Commons The Satan’s Hole Pupfish is probably the rarest fish on this planet, discovered only in a single, distant area. This very small, vibrant fish resides in https://medium.com/@FishAquariumOnline/how-to-enhance-your-fish-pond-2e10a0c1f450