What does the dart frog and the red bellied piranha have in common?

Both the dart frog and the red-bellied piranha are native to South America and inhabit tropical environments, primarily in the Amazon rainforest and river systems. They exhibit bright coloration, which serves as a warning to potential predators—dart frogs with their toxic skin and piranhas with their sharp teeth. Additionally, both species play significant roles in their respective ecosystems, contributing to the food web as both prey and predators.