Blue Submarine No. 6

""A sea of endless blue...""

A four-episode anime, taking place after the apocalypic flooding of Earth by Emperor Scientist Dr. Zorndyke. With the remaining cities ravaged by Zorndyke's army of fish-human hybrids - his "children" and intended heirs to the new world - the last hopes of humanity fall on the remaining submarine fleet, the titular No.6, and aquaphobic cadet-turned-slacker Tetsu Hayami.

Aired on Toonami back in its glory days.

Blue Submarine No. 6 contains examples of:

 * A God Am I: Subverted. Zorndyke doesn't think of himself as one because he thinks he is "not nearly so arrogant as that".
 * After the End: All coastal human cities are underwater as a result of Zorndyke's arctic melting.
 * Anti Hero: Kino.
 * Anti Villain: Zorndyke, depending on whether you sympathize with his motivations.
 * Apocalypse How: A Class 1. Zorndyke flooded earth's coastal areas..
 * Bittersweet Ending
 * Child Prodigy: Mei-Ling is ten years old and operates complex sonar machinery for a military vessel.
 * Conspicuous CG: Gonzo were never known for their ability to believably incorporate CG into their animated series. Blue Sub 6 is among their earliest efforts, so one might forgive them in this case - particularly as the rest of the animation is gorgeous.
 * Cool Ship: Blue Sub No. 6, and many others.
 * Cute Monster Girl: Mutio and the other fish-girls, as well as the furry girl at the end.
 * Cute Mute: Mutio, just about. The only word she can say is Hayami.
 * Emperor Scientist: Dr. Zorndyke is the poster boy for this trope.
 * Expy: Zorndyke is Dr. Moreau, more or less. See below.
 * Fan Service: Hayami's shirtless scene at his introduction and in the third episode, plus Kino's skin-tight body suit, which she often unzips halfway for some cleavage.
 * Fish People
 * Heroic Sacrifice: The Japanese SSGN that attacks the Ghost Ship.
 * Hot Sub On Whale Action: Most of the fight scenes.
 * Hopeless War
 * Humans Are Bastards: Why Zorndyke created his fish-people and flooded the world in the first place.
 * Zorndyke himself is probably by far the worst.
 * Interspecies Romance: Hayami and Mutio.
 * Literal Change of Heart: Turns out that.
 * Macross Torpedo Massacre
 * Mad Scientist: How the world (and a fair number of viewers) view Zorndyke.
 * Mermaid Problem: Averted. Implicitly.
 * Mickey Mousing: Hot Sub On Sub Action choreographed to bossanova. It's as awesome as it sounds.
 * Nice Job Breaking It Hero:.
 * No Export for You: The very obscure prequel and sequel video games.
 * To a lesser extent, a R2 UK release, or, to better put it, the lack of such.
 * No Holds Barred Beatdown: Verg to Hayami at the end.
 * Not to mention the severe (though short) beatdown Mutio receives at the beginning of episode 4 (and just before the start of the episode) with a sheathed, heavy sword. Leaving her just enough strength to limp-swim away, bloody and injured.
 * Nuke Em: Humanity's back up plan to finish Zorndyke.
 * "So that's the plan? Nuke the psycho? THAT'S original" -Hayami
 * Ocean Punk
 * Our Mermaids Are Different: Mutio and her sisters.
 * Psychopathic Manchild: Verg. He wants to please Zorndyke, whom he calls "Papa", but is extremely violent and prone to throwing temper tantrums.
 * Recycled UNDER WATER!: The series is essentially a retelling of The Island of Dr. Moreau WITH FISH PEOPLE.
 * Scary Shiny Glasses: Zorndyke
 * Scavenger World: As a result of many of the former cities being underwater know.
 * Sci Fi Writers Have No Sense of Scale: While 1 billion people seems like a lot, given the effects of the flood (enough to half-way sink a skyscraper) it should've killed a lot more. To get an idea: there are about 7 billion people currently in the world.
 * The english dub over-corrects and claims 10 billion people died.
 * Silence You Fool: Verg in the dub.
 * Soundtrack Dissonance: It's debatable whether the rather discordant, wailing jazz soundtrack fits the tone of the series.
 * Star Crossed Lovers: Though at least it's implied by the final episode credits that Hayami and Mutio will eventually get back together once things finally settle down.
 * The End of the World As We Know It: What sets of the main plot of the series, is Zorndyke plan to reverse the magnetic poles of the earth, thus rendering it completely uninhabitable.
 * Transforming Mecha: The Grampus mini-sub.
 * Tsundere: Hayami. Mostly tsun.
 * Underwater Base: The headquarters of the Blue fleet..
 * Underwater Ruins: See above. We see mostly Tokyo, but is implied that most of the world is flooded.
 * Well Done Son Guy: Verg.
 * Well Intentioned Extremist: Zorndyke.