This action implements 2008 specifications and management measures for Atlantic mackerel, squid, and butterfish (MSB) and modifies existing management measures. Specifically, it clarifies gear requirements for the Loligo squid fishery, standardizes procedures for closing the Atlantic mackerel (mackerel) and butterfish fisheries, modifies incidental possession limits for mackerel and butterfish, and establishes a butterfish possession limit. These specifications and management measures promote the utilization and conservation of the MSB resource.