History Manga / Gyo

* HelpingHands: Tadashi's uncle lose a hand to one of the walking-machines. The same appendage somehow gains sentience on it's own later on.

During UsefulNotes/WorldWarII, the Imperial Japanese Army commissioned a secret experiment to create biological weapons. The end result - a deadly bacteria that infected corpses and released nauseous gases, and a walking mechanism fueled by these gases, for the purpose of spreading infection. This plan was averted when the ship carrying the bio-weapon was sunk by American bombers during the war - but the bio-weapon remains active, infecting the sea life and spreading back into Japan in the form of what appears to be [[NinjaPirateZombieRobot undead walking fish]].

* HellIsThatNoise: The arrival of the Great White Shark is always precipitated by the sound effect "GASHUNK"

* LostInTranslation: The title in both English and Japanese (rendered as ''ギョ'' in katakana) is a phonetic rendering of an AlternateCharacterReading for ''魚'' ("fish"). Normally read as ''sakana'', the alternate reading typically appears in the context of compound words like the word for mermaid, ''ningyo'' (''人魚'', literally person-fish) or the Japanese name for the ichthyosaur, ''gyoryuu'' (''魚竜'', literally Fish-Dragon). A rough equivalent for the intentional oddness conveyed would be somewhere between "Pheesh" and "Ichthy"--something ''of'' fish, but not ''a'' fish.

* TentacleRope: One of the new monsters in the OVA is an octopus walker that predictably grabs Kaori. Luckily, she's saved before anything bad befalls her.

* AssholeVictim: Kaori in the manga spends most of her screen-time being such a whiny, ungrateful {{Jerkass}} to Tadashi that it is hard to feel bad for her when she meets her ultimate demise.

%%* JustBeforeTheEnd

* AndIMustScream: The victims of the walking machines may ''still be conscious''. [[spoiler:Kaori is conscious enough to recognize Tadashi, mistake him for being with Ms. Yoshiyama when she sees them holding each other, activate her machine so she can try to kill them, and reach out for Tadashi when she gets killed by the other walkers.]]

* HotScientist: Ms. Yoshiyama is quite attractive, enough so that Kaori gets jealous and murderous, despite being taken over by the gas and put in a walker.

During World War II, the Imperial Japanese Army commissioned a secret experiment to create biological weapons. The end result - a deadly bacteria that infected corpses and released nauseous gases, and a walking mechanism fueled by these gases, for the purpose of spreading infection. This plan was averted when the ship carrying the bio-weapon was sunk by American bombers during the war - but the bio-weapon remains active, infecting the sea life and spreading back into Japan in the form of what appears to be [[NinjaPirateZombieRobot undead walking fish.]]

* AnArmAndALeg: [[spoiler:Tadashi's uncle is forced to cut off his left arm when it gets caught by the walking machine he was studying. Tadashi also almost loses his foot when he steps on an open walking machine, which causes him to be more careful while walking around.]]
* AndIMustScream: [[spoiler:The victims of the walking machines may ''still be conscious''. Kaori is conscious enough to recognize Tadashi, mistake him for being with Ms. Yoshiyama when she sees them holding each other, activate her machine so she can try to kill them, and reach out for Tadashi when she gets killed by the other walkers.]]
* AssShove: One of the rare examples played entirely for horror, without a single hint of humor. The pipes in the walking machine shove themselves into the mouth and anus of their host, as the machine is powered by the gas emitted by the germs in the body. [[spoiler:It happens when infected humans get wired into the walking machines.]]

* BodyOfBodies: Something like this becomes a commonplace sight, [[spoiler: with larger fishes' emptied walkers taking on many human bodies to continue powering them.]]
* BrickJoke: The first walking fish is smashed and bagged, [[spoiler:but its bacteria keeps producing enough gases to make it ''float to the mainland.'']]

* DevouredByTheHorde: Tadashi nearly becomes a victim of this when he lands on a huge group of undead tiny fish and goes unconscious. However, he is rescued offscreen.
* DownerEnding: [[spoiler:Apart from Tadashi meeting up with LaResistance, it's a total downer. Kaori is killed by the other walking machines and apparently incinerated (although given the context, Tadashi notes that this counts as a MercyKill), Tadashi's uncle is revealed to have attached himself to his own walking machine and forces Ms. Yoshiyama to join him and they fly off to destinations unknown, and the future is bleak besides Tadashi and the other immune survivors vowing to find a way to put an end to the catastrophe.]]

* DramaticIrony: When [[spoiler:Tadashi and Ms. Yoshiyama discover Tadashi's uncle attached to a walking machine and he goes after them, they wonder if it's because he's still conscious and thinks they're romantically involved, they try to explain to him that they're not. When this fails (it's unclear if he couldn't hear them or if that wasn't the problem), [[NotQuiteDead Kaori]] sees Tadashi and Ms. Yoshiyama holding each other (in fear) and makes the assumption they made about Tadashi's uncle, leading to her reactivating her walker and attempting to kill them.]]

* EvilUncle: More like callous and really crazy uncle.

* {{Hot Scientist}}: Ms. Yoshiyama. Enough that Kaori gets jealous and murderous, despite being taken over by the gas and put in a walker.
* {{Just Before the End}}

** The soldier who shoots at [[spoiler:the legged machines driven by human bodies, and then gets impaled by one.]]

* MercyKill: [[spoiler:Tadashi notes to Kaori's charred corpse that her death is this, as she no longer has to suffer from being attached to the walker and doesn't have to put up with the smell of rotting corpses anymore.]]

* {{Threatening Shark}}s: Walking ones, with spider legs. An early terror.

!!!Tropes from the OVA:
* AdaptationDeviation: In the OVA, [[spoiler: it's Tadashi who gets infected instead of Kaori.]]

** Tadashi retains his levelheaded personality even if his role is downplayed in Kaori's favor. [[spoiler: Their roles are generally switched, as Tadashi is the one who becomes infected by the gas while Kaori is trying to find him. The two don't even spend any screen time in the same room up until Kaori finally finds him at his uncle's house.]]

* TheDogBitesBack: Aki to Erika [[spoiler:once she's been infected.]]

* HeavyVoice: This, combined with VoiceOfTheLegion, is a side effect of [[spoiler:Erika's]] infection.

* VoiceOfTheLegion: This, combined with HeavyVoice, is a side effect of [[spoiler:Erika's]] infection.

[[quoteright:310:https://static.tvtropes.org/pmwiki/pub/images/gyo_2375417.jpg]]

GASHUNK

* HellIsThatNoise: The arrival of the Great White Shark is always precipitated by the sound effect "GAHSHUNK"

* AssShove: One of the rare examples played entirely for horror, without a single hint of humor. The pipes in the walking machine shove themselves into the mouth and anus of their host, as the machine is powered by the gas emitted by the germs in the body. [[spoiler:[[http://i5.mangareader.net/gyo/13/gyo-2375855.jpg It happens when infected humans get wired into the walking machines.]]]]

* LostInTranslation: The title in both English and Japanese (rendered as ''ギョ'' in katakana) is a phonetic rendering of an AlternateCharacterReading for ''魚'' ("fish"). Normally read as ''sakana'', the alternate reading typically appears in the context of compound words like the word for mermaid, ''ningyo'' (''人魚'', literally person-fish) or the Japanese name for the ichthyosaur, ''gyoryuu'' (''魚竜'', literally Fish-Dragon). A rough equivalent for the intentional oddness conveyed would be somewhere between "Pheeche" and "Ichthy"--something ''of'' fish, but not '''a''' fish.

* BilingualBonus: The title in both English and Japanese (rendered as ''ギョ'' in katakana) is a phonetic rendering of an AlternateCharacterReading for ''魚'' ("fish"). Normally read as ''sakana'', the alternate reading typically appears in the context of compound words like the word for mermaid, ''ningyo'' (''人魚'', literally person-fish) or the Japanese name for the ichthyosaur, ''gyoryuu'' (''魚竜'', literally Fish-Dragon). The exact nuance is somewhat LostInTranslation, but a rough equivalent for the intentional oddness conveyed would be somewhere between "Pheeche" and "Ichthy"- fish but not fish.

* EverybodysDeadDave: [[spoiler:Tadashi is the only named character we know for sure survives.]]
** In the OVA, [[spoiler:Kaori is this.]]

* RealityEnsues / SquareCubeLaw: At one point, a sperm whale on robot legs crawls out of the sea... but immediately crushes the legs under its weight.

* SparedByTheAdaptation: [[spoiler:Kaori]] in the anime.

* ZettaiRyouiki: Erika wears a skirt and thigh-highs during the group's trip. It ends up being a hindrance more than anything else.