A rare rainbow fish that has never been caught by mortal man. More detail.

This card's name is treated as Umi. Downgrade all WATER monsters in both players' hands and on the field by 1 Level. Increase the ATK and DEF of all WATER monsters by 200 points. More detail.

While Umi is face-up on the field, this card can attack your opponent's Life Points directly. More detail.

Destroy all face-up WATER monsters on your side of the field. Then you can Special Summon WATER monsters from your hand, up to the same number of monsters destroyed by this effect. More detail.

Select 1 monster from your Graveyard and Special Summon it in face-up Attack Position. When this card is removed from the field, destroy the monster. When the monster is destroyed, destroy this card. More detail.

Both players select 1 monster from their respective sides of the field and switch control of those monsters with each other. The selected monsters cannot change their battle positions this turn. More detail.

When this card is Normal Summoned successfully, no Trap Cards can be activated. More detail.

Destroy 1 Spell or Trap Card on your opponent's side of the field. You can then Set 1 Spell or Trap Card from your hand. More detail.

This card cannot be Normal Summoned or Set. This card can only be Special Summoned by removing from play 2 WATER monsters in your Graveyard. When this card destroys an opponent's monster as a result of battle, your opponent skips their next Draw Phase. More detail.

All Level 4 or higher monsters on the field cannot attack. More detail.

Destroy 1 face-up Attack Position monster with the highest ATK on the field. More detail.

Destroy all Spell and Trap Cards on the field. More detail.

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While Umi is on the field, this card can attack twice during the same Battle Phase. More detail.

When this card is Tribute Summoned successfully, you can destroy up to 2 Spell or Trap Cards on the field. More detail.

When this card is sent to the Graveyard as a result of battle, you can Special Summon 1 WATER monster with an ATK of 1500 or less in face-up Attack Position from your Deck. Then shuffle your Deck. More detail.

Destroy 1 Spell or Trap Card on the field. More detail.

This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 Levia-Dragon - Daedalus on your side of the field. Send Umi on your side of the field to the Graveyard to send all cards in both players' hands and More detail.

Draw 2 cards from your Deck. More detail.

Pay 800 Life Points. Select 1 monster from your Graveyard, Special Summon it on the field in face-up Attack Position, and equip it with this card. When this card is destroyed, destroy the equipped monster. More detail.

Add all cards in your hand to your Deck and shuffle it. Then draw the same number of cards that you added to your Deck. More detail.

Add 2 WATER monsters in your Graveyard with an ATK of 1500 or less each to your hand. More detail.

A warrior who defends the world of the Sea of Darkness. He prides himself on his fighting prowess both on the ground and, of course, in the water. More detail.

Take control of a monster on your opponent's side of the field that is equipped with this card. Increase your opponent's Life Points by 1000 points during each of their Standby Phases. More detail.

A Space Mambo floating in the vast universe. This living relic was found in the ruins of a super civilization on Alphard 4. More detail.

Select and activate 1 of the following effects:
- Negate the activation and the effect of a Spell Card that targets 1 monster on the field and destroy the Spell Card.
- Send 1 Spell Card from your hand to the Graveyard to negate the activation and the eff More detail.

As long as this card remains face-up on the field, increase the ATK of all WATER monsters by 500 points and decrease the ATK of all FIRE monsters by 400 points. More detail.

This card can only be activated when Umi is active on the field. As long as Umi remains face-up on the field, any damage from attacking monsters to your Life Points becomes 0. When Umi is removed from the field, this card is also destroyed. More detail.

You can only activate this card when a monster is Normal Summoned, Flip Summoned or Special Summoned. Destroy all monsters on the field. More detail.

Discard 1 card from your hand and declare 1 Type of monster. Destroy all face-up monsters of the declared Type on the field. More detail.

If you Tribute Summon a WATER monster, you can treat this 1 monster as 2 Tribute Monsters for the Tribute Summon. More detail.

Select 2 Set Spell or Trap Cards on the field and activate this card. As long as this card remains on the field, the selected Spell or Trap Cards cannot be activated. More detail.