As its name implies, it is a red fish with three magma coils wrapped around its snout. Its fins and tails appear to be made out of molten magma, while the rest of its body remains unaffected by the intense heat of the magma pools.
It is possible for players to exchange the Coilfish for gold during Slayer's Tasks if the task card is currently active. Players can also consume the Coilfish in order to restore 33 HP back to their health pools. Other than that, it can be sold to a selling vendor at a selling price of 3,300 gold.