Rather smelly and fishy.
The item id for Goldfish Raw in unturned is 1349. 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: 1
Size_Y: 1
Size_Z: 0.25
Food: 10
Virus: 10
ConsumeAudioClip: Sounds/EatCrunchy.mp3