Rather smelly and fishy.
The item id for Trout Raw in unturned is 504. 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: 0.2
Food: 20
Virus: 20
ConsumeAudioClip: Sounds/EatCrunchy.mp3