• This card was nearly useless in the TCG when it was first released, because only "Zone Eater" had been released in English, although it requires 3 Fusion Materials. Therefore, it couldn't be Fusion Summoned till at least one other material was released.
  • This is the only Fusion Monster that is a Sea Serpent monster. However, most Fusion Monsters have at least one Fusion Material monster with the same Type as the Fusion Monster, but for "Aqua Dragon" (being a Sea Serpent), none of its Fusion Material monsters ("Fairy Dragon", "Amazon of the Seas" and "Zone Eater") is a Sea Serpent. Another monster with such oddity is "Skull Knight", which is a Spellcaster, but its Fusion Materials, "Ancient Brain" and "Tainted Wisdom", are Fiends.
  • This card's name and appearance is aesthetically similar to "Water Dragon".