This action implements 2009 specifications and management measures for Atlantic mackerel, squid, and butterfish (MSB), and modifies existing management measures. Specifically, this action maintains quotas for Atlantic mackerel (mackerel), Illex squid (Illex), and butterfish at the same levels as 2008, while increasing the quota for Loligo squid (Loligo). Additionally, this action increases the incidental possession limit for mackerel and allows for the possibility of an inseason adjustment to increase the mackerel quota, if landings approach harvest limits. These specifications and management measures promote the utilization and conservation of the MSB resource.