Fish food

Fish Food is a free-to-play item on the OSRS Grand Exchange in the food category.

In-game examine text: "Keeps your pet fish strong and healthy."

It has a Grand Exchange buy limit of 15 every four hours, a high alchemy value of 1 gp, and item ID 272.

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Fish Food shows an active flip setup with a margin of +87 gp and 958 trades over the last 24 hours.

At the buy limit of 15 every four hours, max profit per cycle is about 1.3k gp — high margin with healthy liquidity.