IsaacHDIsaac Rebirth

Gish (ギシ Gishi) is an alternative boss replacing Monstro II in The Depths. He is unlocked after beating The Depths 30 times.


He appears very similar to Monstro with tar colors, beady yellow eyes and sharp fangs.


Gish's attack pattern is similar to that of Monstro II. However, instead of a blood beam, he attacks with exploding projectiles that leave behind puddles of tar that slow down the character. Instead of Monstro II's Sucker-spawning attack, Gish spawns two smaller Clots based on himself. Unlike with Monstro II, his first stomping attack does not produce any projectiles.

Gish is unlocked by clearing The Depths 30 times. Upon defeat, he will drop Little Gish if the character do not already have it.


Gish is an easy boss once the character get the hang of his attack patterns. His leaps into the air are easy to avoid and his spawned Clotties are simple enemies. His tar ball attack is easy to dodge, as the character can just run in a circle and Gish will usually miss. With this fight, patience is the key.

Champion Variant


Eternal Gish

Eternal Gish always spawns 2 Clots (sometimes I. Blobs) whenever he jumps, and shoots 3 IPECAC shots instead of 1.


  • Gish is a character from Edmund's game, Gish.
  • Gish was also an unlockable in another of Edmund's games, Super Meat Boy and the free flash game Meat Boy, and appeared as a part of customization in his game Host.
  • In another flash game by Edmund, Spewer, "Gishy" is the name of the achievement the player get when they complete the fourth chapter, and has an image of what seems to be Gish.
  • Gish means 'to spew' or 'to vomit'.


Related Achievements

Stickerfingers "I Have Sticker Fingers..." - Defeat Gish.

Regular Bosses
BlastocystChubDaddy Long LegsDark OneDingleDuke of FliesThe FallenFistulaGeminiGurdyGurdy Jr.GurglingsThe HauntLarry Jr.LokiMama GurdyMask of InfamyMega FattyMega MawMonstroMr. FredPeepPinPolycephalusScolexTurdlingsWidow

Afterbirth: BrownieDangleLittle HornRag ManTurdlings
Afterbirth †: Big HornRag Mega
Antibirth-only: Baby PlumBeelzeblubChimeraGreat GideonHornfelThe RainmakerReap CreepRotgutThe ScourgeThe SirenTuff TwinsWormwood

Posthumous Bosses
The AdversaryThe Blighted OvumThe BloatThe CageCarrion QueenThe GateThe HollowThe HuskLokiiMonstro IITeratomaThe Wretched

Afterbirth: The ForsakenThe FrailThe Stain
Antibirth-only: The HereticThe PileThe Visage

Alternative Bosses

Afterbirth †: Sisters Vis

ConquestWarFamineDeathPestilenceHeadless Horseman
Final Bosses
???IsaacIt LivesThe LambMega SatanMomMom's HeartSatan

Afterbirth: HushUltra Greed
Afterbirth †: Delirium
Antibirth-only: The Witness

Seven Deadly Sins
Seven Super Deadly Sins
Super EnvySuper GluttonySuper GreedSuper LustSuper PrideSuper SlothSuper WrathUltra Pride
Angels / Demons
KrampusGabrielUrielFallen Angels
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