From the Introduction: "The productivity and profitability of marine fisheries may vary significantly due to natural and anthropogenic causes, such as oceanic conditions, climate, pollution, and weather events. These factors can cause fishery resource declines and fishery closures and can damage commercial infrastructure such as boats, shoreside processing, and ports. Fishery disasters occur when fishermen endure economic hardships resulting from fish population declines or other disruptions to the fishery. The federal government may provide disaster relief to assist the fishing industry when it has been harmed by a fishery disaster."
CRS Report for Congress, RL34209
Congressional Research Service: https://crsreports.congress.gov/