Rainbow fish

A Rainbow fish is a Food item that heals 110 Lifepoints in one bite. Players can make it by cooking a Raw rainbow fish on a Range or a Fire. Doing so requires level 35 Cooking and grants 110 Cooking Experience if successful. Players stop burning Rainbow fish at level 62 Cooking.

It also can be looted from a Gourmet impling.

Although the rainbow fish heals 110 Lifepoints, it is no where near as popular and expensive as other fish that heal a similar amount, such as the lobster. The fish is easier to obtain if you are not considering the option of buying food, as this can be fished at the fishing spots near the Barbarian Village, at a lower fishing level, and faster. This is also close to the Grand Exchange and Varrock.

Trivia

 * Despite being called Rainbow fish, they only have three colours (yellow, light blue/turquoise and dark blue).

‎Rainbow fish Rainbow fish