Concept art from Final Fantasy XII: Revenant Wings.
The Aspidochelon (アスピドケロン, Asupidokeron?), also known as the Aspidochelone or Opinicus, is a recurring creature in the Final Fantasy series.
Appearances[]
Final Fantasy VI[]
The Aspidochelon, also known as the Opinicus, appears as an enemy encountered in Ebot's Rock. If it is not defeated in five turns, it will attack with Rage. It can also counter magic attacks with Wind Slash.
Final Fantasy XI[]
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The Aspidochelone appears as an adamantoise notorious Monster encountered in the Valley of Sorrows. It can be spawned using a Red Pondweed obtained from an Adamantoise. It drops the Heavy Cuirass and Sipar, and grants the title Aspidochelone Sinker.
Final Fantasy XII[]
The Aspidochelon appears as a rare game enemy encountered Cerobi Steppe. After the player has begun the rare game sidequest, it has a 40% of spawning in the Feddik River area. The rare item Scarletite can be stolen from it.
Final Fantasy XII: Revenant Wings[]
The Aspidochelon appears as a rank II non-elemental melee yarhi. It is encountered as part of a side mission in Gugoza Falls, as the party seek to obtain the sword embedded in its back. The Aspidochelon will not actively seek to attack the party and will instead rely on other enemies to protect it. It has high defense that it can increase further using the Shelter ability.
Final Fantasy XIV[]
The Aspidochelone appears as a boss encountered during the FATE 
Bigger than Life in the Zanr'ak area of Southern Thanalan. The flavor text for the FATE notes that it takes four score summers (80 years) for an adamantoise to reach full size, which Aspidochelone eclipses, and wonders at how long it took for it to reach its colossal size, or how much it had to consume.
Final Fantasy XV[]
The Aspidochelon appears as a mark encountered during the Starving Beast Seeks Food hunt in the Lower Wennath region of Cleigne. It can also appear during a timed quest near Longwythe Peak in Leide.
Final Fantasy: The 4 Heroes of Light[]
The Aspidochelon appears as an enemy encountered in the Liberte region, Pirate Hideout, and Moonsand Ruins. It can make itself immune to physical attacks with the Unbreakable ability.
Pictlogica Final Fantasy[]
The Aspidochelon from Final Fantasy VI appears as an enemy.
Final Fantasy Record Keeper[]
The Aspidochelon from Final Fantasy VI appears as an enemy.
Etymology[]
According to the tradition of the Physiologus and medieval bestiaries, the aspidochelone is a fabled sea creature, variously described as a large whale or vast sea turtle, and a giant sea monster with huge spines on the ridge of its back.