Big Snakehead (Etrian Odyssey III) Edit
Big Snakeheads are first encountered on B13F.
One of the more dangerous creatures in the Abyssal Shrine, it can seriously wreck an entire row with an electric Torpedo attack, especially if it blindsides the party.
Conditional Drop Edit
In order to get the Big Snakehead's conditional drop, the Dull Chest Fin, you must kill it with Curse damage. Since Torpedo is a very damaging attack, it is simply a matter of making sure it remains cursed long enough to kill itself with it.