What strain is Tuna OG? About Tuna OG Tuna OG also known as OG Tuna Kush is a 50/50 hybrid. Utilizing the cross of OG Kush and Black Tuna to produce this bud which packs a strong potency and punch. Beautiful buds have nice red hairs encased in deep emerald leaves. Be careful of the potency even if you are an experienced user.