Headless Fish is a consumable item that can be used as Camp Supplies to initiate Long Rests.
Tiny fish bones stick out from the cut tail.
Properties
Camp Supplies: 4
Single Use
Rarity: Common
Weight: 0.2 kg / 0.4 lb
Price: 4 gp 
UID
DEC_HAR_Fish_Big_A_Headless_AUUID
312f18f7-fe4b-49c8-bc81-c4042b99f897
Where to find
Found in various locations throughout the world either as loot or sold by Traders