OMEGA - Dietary Intervention - COPD Trial

Inclusion Criteria: * Age ≥ 40 years, * Physician diagnosis of COPD, * Global Initiative for Obstructive Lung Disease (GOLD) Stage II-IV disease with Forced Expiratory Volume in the First Second (FEV1)/ Forced Vital Capacity (FVC) \<70% and FEV1 (% predicted) \<80%. IF FEV1/FVC \<70% and FEV1 (% predicted) ≥ 80%, additional requirement will be asked: CAT score ≥ 10. Also, IF available for screening purposes: participant can provide a previous pulmonary function testing (PFT) report within the last 6 months. * Tobacco exposure ≥ 10 pack-years, * Poverty criteria as determined by residing in a neighborhood with ≥10% of residents living in poverty, consistent with the definition of poverty area OR not access to private health insurance, OR only completed high school education or less. * Low omega-3 intake (reported daily intake of EPA+DHA intake \<500 mg via diet and/or supplement) at the screening visit, and * Willing to comply with dietary recommendations Exclusion Criteria: * Participant planning to change residence during study period, * Other chronic lung disease, except those with history of asthma if it felt by the investigator not to be a primary diagnosis. * Pregnancy or breastfeeding and * Reported unwillingness to eat seafood.