Fish Deck

The additions of the Tactical Evolution, Phantom Darkness, and The Duelist Genesis packs have given much needed support to make Fish a viable deck option.

The idea of this deck is to Summon Superancient Deepsea King Coelacanth with either a standard Tribute Summon, the effect of Unshaven Angler, or Big Wave Small Wave. You can then use his effect to summon Monsters that can be used as Tributes for Summons, Spiritual Water Art - Aoi, or Fish Depth Charge. For example, you can Summon Oyster Meister, use it for Spiritual Water Art - Aoi and use its token for Fish Depth Charge. Or you can use Deepsea Macrotrema to give your other Fish a power boost for that turn (yes these are legitimate combos as the effects of Oyster Meister and Deepsea Macrotrema activate in the Graveyard). Finally, you can summon Ocean's Keeper to Tribute for Thousand-Eyes Jellyfish (which I don't recommended) or Cranium Fish (a very awesome card to incorporate, regardless of the use of Ocean's Keeper.

A few cards to take note of:

A Legendary Ocean - This make Superancient Deepsea King Coelacanth require only 1 Tribute to Summon. You can also Summon Terrorking Salmon without a Tribute, which it will then be able to destroy the popular Stardust Dragon (which can really mess with Fish Depth Charge) by battle. The power boost is also slightly helpful.

Levia-Dragon - Daedalus - While not a Fish monster, if you use A Legendary Ocean, you can use this as a back-up plan.

Umiiruka - Another Field Spell available. This one is solely for power boosts, however.

Cyber Shark - You can't Summon this with Superancient Deepsea King Coelacanth, but he'll be really easy to Summon with his help. You don't require a Tribute to Normal Summon him if a Water Monster exists on your side of the field. Just note that the effect of Superancient Deepsea King Coelacanth forces you to fill as many Monster Card Zones as possible. Also, do not use this card with A Legendary Ocean, as otherwise you would be better off using Terrorking Salmon.

Cranium Fish - Possibly even more threatening than Superancient Deepsea King Coelacanth. Discard a Water Monster to destroy a Face-down card! This gives you no fear of Bottomless Trap Hole for summoning your other Fish, or Mirror Force when you attack.

Abyssal Kingshark - Try not to summon this one with the effect of Superancient Deepsea King Coelacanth. Its effect will be very helpful if you accidentally run into a Torrential Tribute or Mirror Force, as he won't be destroyed (works once per turn)! You can also combo this with Levia-Dragon - Daedalus to clear the field, except two monsters you can use for direct attacks.

Golden Flying Fish - Feels left out, being a Light attribute monster. Essentially you have the Hand of the Six Samurai for Fish monsters.

Salvage - Used best with Cranium Fish. You literally supply him with ammo when you use this card. Just be sure you have a good number of Fish with 1500 ATK or less.

Pot of Avarice - To repeatedly use Superancient Deepsea King Coelacanth's effect effectively, you can use this to recycle used Fish, then summon them again to counter the deck fattening!

Monster Cards

 * Superancient Deepsea King Coelacanth
 * Levia-Dragon - Daedalus (if using A Legendary Ocean)
 * Cranium Fish
 * Terrorking Salmon (if using A Legendary Ocean)
 * Cyber Shark (if not using A Legendary Ocean)
 * Warrior of Atlantis (if using A Legendary Ocean)
 * Ocean's Keeper
 * Deepsea Macrotrema
 * Abyssal Kingshark
 * Golden Flying Fish
 * Oyster Meister
 * 7 Colored Fish
 * Penguin Soldier (tech purposes and Salvage fodder)
 * Cyber Dragon (I would consider this a staple, and you can use this for any needed Tribute fodder for cards such as Cranium Fish if you want to use your Ocean's Keeper for its effect, or if it's not with you at the moment.)

Spell Cards

 * A Legendary Ocean
 * Umiiruka (optional/if not using A Legendary Ocean; you can even use both)
 * Terraforming (if using Umiiruka)
 * Big Wave Small Wave
 * Pot of Avarice
 * Salvage
 * Lightning Vortex
 * My Body as a Shield
 * Monster Reborn
 * Mystical Space Typhoon
 * Heavy Storm
 * Monster Reborn

Trap Cards

 * Mirror Force
 * Torrential Tribute
 * Bottomless Trap Hole
 * Spiritual Water Art - Aoi
 * Fish Depth Charge
 * Tornado Wall (if using A Legendary Ocean)
 * Dust Tornado