• In order to avoid this card's restriction, its effect can be used during the Main Phase 2, after it has attacked.
  • Useful monsters this card can Special Summon include:
    • "Toadally Awesome", to put pressure on the opponent by negating their effects. It can Tribute itself as cost, which in turn will trigger its last effect, retrieving itself or another fallen WATER monster.
    • "Mermail Abysstrite", that have a considerable DEF and can be used to revive another "Mermail" monster in the case of being destroyed.
    • Number 30: Acid Golem of Destruction", that can have its control switched with "Creature Swap", so that the opponent will carry all of its drawbacks.
    • "Number 47: Nightmare Shark", that can supply itself with an Xyz Material upon being Special Summoned by this card's effect.
    • "Armored Kappa", that can use its second effect to prevent monsters from being destroyed by battle for a turn.
    • "Humhumming the Key Djinn", in order to use its effect and Special Summon a "Djinn" Xyz Monster from the Graveyard.


  • Level 4 WATER monsters that can be used as Xyz Material:
 Japanese namePrimary typeSecondary typeTypeATKDEF
7 Colored Fishレインボー・フィッシュNormal MonsterFish1800800
Abyss Soldierアビス・ソルジャーEffect MonsterAqua18001300
Abyss Warriorアビス・ウォリアーEffect MonsterAqua18001300
Abyssal Kingshark深海王デビルシャークEffect MonsterFish1700600
Alien Hunterエーリアン・ハンターEffect MonsterReptile1600800
Alien Hypnoエーリアン・ヒュプノEffect MonsterGemini monsterReptile1600700
Amazon of the Seas海原の女戦士Normal MonsterFish13001400
Amphibious Bugroth MK-3水陸両用バグロス Mk-3Effect MonsterMachine15001300
Aqua Armor Ninja機甲忍者アクアEffect MonsterWarrior8001600
Aqua Madoorアクア・マドールNormal MonsterSpellcaster12002000
... further results (172 more)

 Japanese nameTypeRankATKDEF
Armored Kappaアーマー・カッパーPsychic24001000
Cat Sharkキャット・シャークBeast2500500
Humhumming the Key Djinn鍵魔人ハミハミハミングFiend311001800
Mermail Abysstrite水精鱗-アビストリーテSea Serpent316002800
Number 17: Leviathan DragonNo.17 リバイス・ドラゴンDragon320000
Number 30: Acid Golem of DestructionNo.30 破滅のアシッド・ゴーレムRock330003000
Number 47: Nightmare SharkNo.47 ナイトメア・シャークSea Serpent320002000
Number 71: Rebarian SharkNo.71 リバリアン・シャークDragon302000
Paleozoic Anomalocarisバージェストマ・アノマロカリスAqua224000
Paleozoic Opabiniaバージェストマ・オパビニアAqua202400
Shark Caesar牙鮫帝シャーク・カイゼルFish318002000
Submersible Carrier Aero Shark潜航母艦エアロ・シャークFish319001000
Super Quantal Mech Beast Grampulse超量機獣グランパルスMachine318002800
Toadally Awesome餅カエルAqua222000
Tri-Edge Leviaトライエッジ・リヴァイアSea Serpent318001500
Wind-Up Carrier Zenmaity発条空母ゼンマイティMachine315001500