In fishery management, a spawning bed is an artificial bed constructed by wildlife professionals in order to improve the ability of desired game fish to reproduce.
In the inland waters of North America, a typical spawning bed will consist of a series of concrete boxes filled with aggregate gravel.
[1] In a typical example of spawning beds in action, the Illinois Department of Natural Resources has installed approximately 50 largemouth bass spawning beds in Crab Orchard Lake in southern Illinois.
Some vessels have been deliberately sunken, especially in salt water, in order to provide a destination for divers.
In some of these cases the artificial reef also serves a supplemental purpose as a spawning bed.