Morro Bay in California is a small estuary of 2300 acres. It is fed by Chorro and Los Osos Creeks and is protected from the Pacific Ocean by a lengthy sand spit. The estuary is a nursery for many species of fish that live as adults in the ocean. The shallow water, eelgrass beds and wetlands provide protected habitat and rich food sources for larvae and fry. Chorro and Los Osos Creeks also host steelhead trout, a threatened species that spawns in creeks but migrates to the sea.