Lobster

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

In-game examine text: "This looks tricky to eat."

It has a Grand Exchange buy limit of 6,000 every four hours, a high alchemy value of 42 gp, and item ID 379.

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Lobster currently has a flip margin of −1 gp, which isn't profitable to flip right now despite 401,628 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.