Card Trivia:Depth Gardna
- This monster is based on the ammonite, a type of extinct nautiloid famous for its distinct bony shells commonly found at fossil sites.
- This monster may also be based on the nautilus, the living descendants of the ammonite. This is hinted by this card's name, "Depth Gardna", as the nautilus lives in the ocean deep, while ammonites dwelled in the open ocean.
