Amazon has the 6.7oz MW Polar Herring Fillets (Smoked in Canola Oil) for $2.63 - 5% off with Subscribe & Save (can cancel at any time) = $2.50 with free shipping on $25+ or with Prime. Has 1.25g Omega-3 acids per serving.

• 12-Pack 15oz BUMBLE BEE Chub Mackerel for $23