They are highly prized as sport fish. Perch are a popular sport fish species. Black bass were introduced as a sport fish. Shad is a type of fish, much valued as a sport fish. They compete for forage fish with the more popular sport fish. The chain pickerel is a popular sport fish. Attitudes to carp as a recreation or sport fish vary around the world. Intense management for more desirable sport fish could cause a decline in spotted sunfish. When placed in the water, the structures create cover for sport fish. This is a popular sport fish in Southern California. It even makes up around 85% of the sport fish caught in Lake Michigan. As a sport fish, bowfin are not considered desirable to many anglers. As a sport fish, Rock bass are managed to some extent by regulations. "ocellaris" has become the dominant sport fish species in the area. The muskellunge was introduced as predatory sport fish and is now a prized catch.