Answer:
disruptive selection
Explanation:
Disruptive or diversifying selection is a term used to describe population genetic changes that simultaneously favor individuals at both ends of the distribution. When disruptive selection operates, individuals at the extremes contribute more offspring (children) than those with intermediate characteristics, producing two peaks in the distribution on a graph. In this case, the extremes are favored. As an example, we can cite the fish shown in the question, where fish with long rakers are very good at eating plankton, and fish with short rakers are good at deepwater invertebrates. However, fish with intermediate gill rakers are poor in eating any kind of food.
