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* This is one of the [[cover card]]s of ''[[Duelist Pack: Kastle Siblings]]''. * This monster appears in the artwork of "[[Number 39: Utopia Rising]]".** This monster's effect silhouette appears in the artwork of "[[Xyz Revive Splash]]". * The number "73" is inverse of its located on this monster's right thigh plate. * This card has a "[[Number C]]" [[Card evolutions|upgraded]] form: "[[Number C73: Abyss Supra Splash]]". * This card has a "[[Mythyrian NumbersShark (archetype)|Shark]]" counterpart: "[[Abyss Shark]]". * "[[Number]]" monsters often take the form reflecting their owners and/or their original desires. In this case, this [[Mythyrian Number]]represents this card's original owner, [[Reginald Kastle|Nash]], and its [[Number Guardian|"Number" Guardian]], [[Abyss (character)|Abyss]].** This card's Japanese name, "Roaring Waterfall Deity", reflects how Abyss served as the ocean god in the ''[[Yu-Gi-Oh! ZEXAL]]'' anime.** This card is a [[counterpart]] to "[[Number 94: Crystalzero]]", a fellow Mythyrian Number belonging to Nash's sister, [[Rio Kastle|Marin]].*** Both cards share the same [[Attribute]] ([[WATER]]), [[Rank]] (5), and [[Type]] ([[Warrior]]).*** Both cards' [[ATK]]-based effects are complete opposites of each other; in this card's case, it doubles its own ATK.**** In {{episode|ZEXAL|109|ref}}, "[[Number 94: Crystalzero (anime)|Number 94: Crystalzero]]"used its effect to repeatedly halve the ATK of [[Number 73: Abyss Splash (anime)|this card]] and destroy it in battle. This reflects how [[Number 94: Crystalzero (character)|Crystalzero]] was Summoned to counter Abyss's attack on the [[United Lands of the Poseidon Ocean]] while under [[Vector]]'s control.

* This card has a 's number is the opposite of that of "[[Number C37: Hope Woven Dragon Spider Shark]]" version, ".** Both cards were used by [[Reginald Kastle]]/[[Ryoga Kamishiro (manga)|Ryoga Kamishiro]] in the ''Yu-Gi-Oh! ZEXAL'' anime and [[Number C73: Abyss Supra SplashYu-Gi-Oh! ZEXAL (manga)|manga]]", respectively.