Abyssal Gulper Eel

Source
Abyssal Gulper Eel are caught in the inland waters of Spires of Arak for those with fishing skill under ~700. Players will rarely catch them with fishing skill above 800.

Gutting them produces a random amount of Abyssal Gulper Eel Flesh. This can also be down automatically while fishing if Bladebone Hook has been applied.