Simply divine. +5 Food-50 Infection
The item id for Kuwait Fish Holy Mackerel in unturned is 5278. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Consumeable
Size_X: 2
Size_Y: 1
Size_Z: 0.45
Food: 5
Virus: 50
Blueprints: 1
Blueprint_0_Type: Supply
Blueprint_0_Supply_0_ID: 5278
Blueprint_0_Supply_0_Amount: 1
Blueprint_0_Products: 1
Blueprint_0_Product: 5247
Blueprint_0_Build: 27
Blueprint_0_Map: Kuwait