Grass-fed, pasture raised non-bird meats contain O3-O6 in the range of 1:2 to 1:4. More than optimal for awesome homo sapiens health, you'll get an even better ratio if you eat the stomachs (contents and all) which can have up to 60% of the fat as O3. This is actually completely ignoring the very likely possibility of gator/croc or hippo consumption which has fat absolutely loaded with O3! Considering these options along with an occasional nut harvest, you'd absolutely never have to so much as see a fish in your lifetime to still maintain great omega balance.
"You can demonstrate the purpose and limits of human digestion with a simple experiment: eat a steak with some whole corn kernels, and see what comes out the other end. It won’t be the steak."