Mouthbrooding is a fascinating life history strategy, but it makes a lot of sense. Many fish and amphibians lay hundreds of eggs in very vulnerable places. Mouthbrooders reduce that risk dramatically. By housing their eggs and fry (juveniles) in their mouths, very few are predated. Among these different species, there are a couple of different types of mouthbrooding behaviors: maternal and paternal mouthbrooding. We’ll dive into both of these more with our review of sexual selection.