Sizzlefish is currently showing the 15% off sitewide promo as the main offer, represented by the 15% off voucher at the top of this page, and that voucher is best for most single orders where you want a straightforward percent saving across your whole cart. The voucher requires a promo code at checkout and its terms state it cannot be used with any other offers, so it is a simple one code per order choice.
Small orders under $100: use the 15% off voucher at the top if you want a clear discount across the cart. On an $80 order, for example, the 15% off voucher takes 15% off ($12), leaving a final price of $68 and a $12 saving.
Orders around the free shipping threshold ($100): note Sizzlefish has free shipping on orders over $100, available both as a code and as a standard shipping offer. The 15% off voucher cannot be used with other offers, so you cannot combine the 15% voucher with the free shipping code if you try to apply both. If your cart is just over $100 and shipping would otherwise apply, compare the 15% voucher total with simply hitting $100 for free shipping. For example, on a $105 order, 15% off gives $15.75 off, final $89.25, which is usually better than paying shipping only.
Orders $149 and over: the free two 6 oz Wild Pacific King Salmon portions offer requires a code and cannot be combined with other offers. For carts over $149, compare the voucher to the free salmon promotion for the same items; the 15% voucher reduces a $150 order by $22.50 to $127.50. If the two free portions are more valuable to you than $22.50, choose that salmon promotion instead.
Buying the bulk salmon deal or large bundles: the Buy 12 Wild Alaska King Salmon for $249 deal is a fixed price offer on selected products with no code required. If you want exactly that pack, the $249 offer is likely the better path because it is a product specific price. For the same $249 spend, the 15% voucher would take $37.35 off (final $211.65), but you cannot apply the 15% voucher to a product that is already offered at a set bundle price if the product is excluded by selection rules; the bundle is a selected product so use the $249 deal when it matches what you need.
Subscriptions and repeat orders: the $25 off your first two subscription orders offer applies only to subscriptions and cannot be combined with other offers. If you are starting a subscription, use the subscription offer to save $25 on each of the first two deliveries (up to $50 total) rather than the sitewide voucher.
Buying 12 or more crabs in one-time order: the buy 12 get 6 free crab promo applies only to one-time orders and cannot be combined with other offers, so use that code for a crab one-time order if you meet the quantity threshold.
Sale items marked up to 20% off selected products: selected items with up to 20% off are already reduced and are product specific. If a single selected product carries 20% off, that 20% on that item is better than the 15% voucher for that item; however the 15% voucher applies to the whole cart while the sale applies only to chosen products.
When choosing, calculate the full total for your cart with each applicable route and take whichever leaves you with the lower final price. Remember the 15% off voucher at the top of this page states it cannot be used with any other offers, and the subscription, crab and free salmon promotions likewise state they cannot be combined, so treat each as a separate checkout path rather than cumulative codes.