NOAA is seeking sources to develop and validate epigenetic aging models for Northwest Atlantic fish species, supporting the Northeast Fisheries Science Center. The government anticipates a single firm-fixed-price contract with a 5-year performance period, including option years. Responses are due by 2:00 PM PST on June 5, 2026, and must include organization details, a capability statement, and past performance information. The work requires familiarity with regional saltwater fishes and key personnel such as a bioinformatician, with proximity to Woods Hole, MA, noted. No budget amount is specified, and this is a sources sought notice, not a solicitation.