Leeches are the preferred prey of which two fish species?

Leeches are a favored food source for bluegills and bass due to their habitat and feeding behavior. Bluegills, a member of the sunfish family, often inhabit shallow waters where leeches are commonly found. Their foraging strategy frequently involves picking up various invertebrates, including leeches, from the substrate.

Bass, especially during their breeding season or in certain habitats, also readily consume leeches. They are opportunistic feeders that will take a variety of prey, and leeches are nutritious and accessible in many freshwater environments where bass are found.

While the other choices include fish species that may consume leeches occasionally, they are not as closely associated with leeches as bluegills and bass. For example, catfish and perch tend to feed on different types of prey, such as smaller fish and aquatic insects, making bluegills and bass the more appropriate answer regarding leech consumption.