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'''Fish''' ({{Ruby|魚|さかな}} ''Sakana'') is a [[Type]] of [[Monster Card]]. Fish-Type monsters are used by [[Reginald Kastle]] and [[Ren]].

In the past it had very little support, but it received support in ''[[Tactical Evolution]]'', ''[[Phantom Darkness]]'', ''[[The Duelist Genesis]]'', ''[[Crimson Crisis]]'', and ''[[Generation Force]]''. Fish monsters were released in every core set from ''Generation Force'' until ''[[Duelist Alliance]]''. Many Fish support monsters have effects that require the presence or [[Tribute ]] of another Fish to activate, or focus on manipulating advantage through [[banish]]ing (dubbed [[Generation Fish]]).

The first consistent strategy of a Fish Deck used to be to summon [[Summon]] "[[Superancient Deepsea King Coelacanth]]" and use its effect to summon Summon a combination of "[[Fishborg Blaster]]s"s and "[[Oyster Meister]]s"s to [[Synchro Summon]] the cards required to perform an [[OTK]]. However, following the September 2011 List, this combo is no longer playable due to "Blaster" being BannedForbidden. This strategy can be used with "[[Fishborg Launcher]]", but Launcher has restrictions to what can be Synchro Summoned. A newer strategy is to use the Deepsea King's effect to summon Level 2, 3, and 4 Fish monsters so as to [[overlay]] them into [[Xyz Monster]]s that can prove to be quite difficult to summon on their own, such as "[[Number 96: Dark Mist]]" and "[[Number 10: Illumiknight]]". The release of the "[[Shark (archetype)|Shark]]" monsters and the Generation Fish provided an Xyz strategy for Fish monsters, largely focusing on Rank 3-5 monsters, while the "[[White]]" monsters finally provided Fish with their own [[Synchro Monster]]s.

Prominent Fish-Type monsters include "[[Fortress Whale]]", "[[Superancient Deepsea King Coelacanth]]", "[[Earthbound Immortal Chacu Challhua]]", "[[Fishborg Blaster]]", "[[White Aura Whale]]", and "[[Shark Fortress]]". The first [[Xyz Monster]] revealed and that appeared in both the anime and manga, "[[Submersible Carrier Aero Shark]]", is Fish-Type.

Fish rely heavily on using removal to allow them to perform their OTK without interruption, and therefore commonly run "[[Trap Stun]]", "[[Heavy Storm]]"([[Traditional Format]] only), and "[[Malevolent Catastrophe]]". "[[Gold Sarcophagus]]" is also commonly used to search out these cards.

Due to the degree of which Fish are reliant on "Superancient Deepsea King Coelacanth", they must run a tribute Tribute engine. The only truly effective one for Fish at the moment is the [[Frog]] engine, which has the added benefit of giving Fish access to additional draw power in the form of "[[Formula Synchron]]". Running a tribute Tribute engine allows Fish to take advantage of popular tribute Tribute monsters, most notably "[[Caius the Shadow Monarch]]" and "[[Light and Darkness Dragon]]".

*Most Fish-Type monsters are [[WATER]] monsters.**There are no [[FIRE]] Fish-Type monsters.**There is [[Golden Flying Fish|only one]] [[LIGHT]] Fish-Type monster.