Final answer:
The cloudy water in the lake may cause females to be unable to distinguish colors, which could lead to increased mating between the two species and potentially result in a new species through sympatric speciation.
Step-by-step explanation:
In this situation, natural selection may occur due to the change in the environment. Since the cloudy water makes it hard for females to distinguish colors, they may no longer be able to choose a partner from their own species based on color. This could lead to increased mating between the two species, potentially resulting in hybrid offspring. Over time, if these hybrids are successful at reproducing, a new species may emerge through sympatric speciation.