History Anime / UmiMonogatari

* {{Anticlimax}}: [[spoiler: There is no final battle, as Sedna's nature and the accompanying sorrow is accepted by the islanders rather than sealed away]]. There is, however, an emotional battle to save [[spoiler: Urin]].

* MonsterOfTheWeek: The first few episodes have Marin and Kanon battling creatures that Sedna summons. This pattern gets abandoned halfway through the series as it focuses on more personal battles.

* OurMermaidsAreDifferent: Aside from the natural ability to breathe underwater, the sea people are almost exactly like humans.

* PrehensileHair: Two Monsters of the Week have this, using their hair to tie up and strangle Kojima. They nearly kill him before being defeated.

* UnusuallyUninterestingSight: Marin and Urin's PointedEars are never commented on.

* WaterIsAir: A ''huge'' offender. Everyone can speak underwater, there's always at least some light no matter how deep they go, there's barely a bubble in sight, defeated characters fall down instead of floating up, people 'cry'' underwater, people ''drink tea'' underwater, and everyone's hair hangs down instead of flowing upwards.

* {{Gainaxing}}: Oshima invokes this to get Kojima to notice her, only to be quickly outdone by Marin.

* TreasureMap: Marin and Kanon go in search of treasure, but end up finding angry pirates.

* BigBad: Sedna, the being of Darkness that Urin accidentally frees. She then starts corrupting the sea creatures and everyone around her. [[spoiler:However, it's possibly [[NoAntagonist subverted]]- she is at least a non-evil Big Bad, as she is [[TheReveal revealed]] to be the sorrow that the islanders cast away, rather than a truly evil being. The characters accept it rather than defeat it.]]

* BigBad: Sedna, the being of Darkness that Urin accidentally frees. She then starts corrupting the sea creatures and everyone around her. [[spoiler:However, it’s possibly [[NoAntagonist subverted]]- she is at least a non-evil Big Bad, as she is [[TheReveal revealed]] to be the sorrow that the islanders cast away, rather than a truly evil being. The characters accept it rather than defeat it.]]

* [[spoiler:EverybodyLives: Despite numerous warnings of death should specific actions be taken, no one dies at the end of the series. Not even Sedna, as she is accepted back into peoples’ hearts.]]

* RedHerring: [[spoiler:The Elder Turtle is often wary of Kanon and is convinced she will [[DarkMagicalGirl fall into darkness]] if not watched. He's wrong. Marin does.

* VocalDissonance: Kojima sounds ''very'' girlish despite being a studious young man..

* DesignatedLoveInterest: Kojima, with whom Kanon doesn't even have a fraction of [[RomanticTwoGirlFriendship the chemistry she has with Marin]].

* RomanticTwoGirlFriendship: Kanon and Marin become very close friends over the course of the series.

* RomanticTwoGirlFriendship: Curiously, Marin and Urin's relationship seems to swing that way, despite their age difference.
** Also between Kanon and Marin.

* AnAesop: [[spoiler: Everyone has darkness in their hearts. That's normal, and we must learn to accept it, not cast it out.]]

* BigBad: Sedna, the being of Darkness that Urin accidentally frees. She then starts corrupting the sea creatures and everyone around her. [[spoiler:However, it’s possibly [[NoAntagonist subverted]] when she is [[TheReveal revealed]] to be the sorrow that the islanders cast away, rather than a truly evil being. The characters accept it rather than defeat it.]]

''Umi Monogatari'' is unusual among MagicalGirlWarrior shows in that the focus is more on emotional development of the characters, the fights are fairly long, the girls' mentor is completely wrong about some things, most of the music is gentle piano music, and the revelation of what the BigBad ''really'' is allows for a conclusion that's more true to life than most shows of this nature.

* AnAesop: [[spoiler: Everyone has darkness in their hearts. That's normal, and we must learn to accept it, not cast it out]].

* BittersweetEnding: [[spoiler:Kanon and Marin defeat Sedna, but have to separate since land and sea people are not supposed to be together. It is hinted that Kanon will keep looking for Marin]]. In the DVD special [[spoiler:Kanon keeps longing to meet Marin again, and almost encounters her]].

* ButterflyOfDeathAndRebirth: Eerie blue butterflies show up the night of the eclipse. [[spoiler: Urin grows butterfly wings after hatching from a cocoon]].

* TheCorrupter: Sedna corrupts the islanders, sea creatures, and [[spoiler:Urin]] to suit her needs.

** In the end, [[spoiler: Sedna fits this, as she was created out of accumulated sadness in people's hearts]].

* EverybodyLives: Despite numerous warnings of death should specific actions be taken, no one dies at the end of the series.
* FaceHeelTurn: [[spoiler: Urin]] turns evil halfway through the series.
* FantasticRacism: Urin's not exactly pleased with the people on land, and often wishes to return to the sea.

* TheHeartless: [[spoiler:Sedna fits this, being born out of the people's sorrow]].

* HopeSpot: In episode 11, Marin and Kanon try to combine their powers to save Urin from Sedna. She just absorbs it, draining them completely and shattering their [[TransformationTrinket transformation stones]].

* IncorruptiblePurePureness: The Elder Turtle thinks Marin is this, and strives to protect her from the darkness. [[spoiler:Instead she falls into it]].
* {{Iyashikei}}: This anime is about accepting your inner darkness.

* KnowNothingKnowItAll: The Elder Turtle has shades of this; not only is he wrong about [[spoiler: which priestess will fall into darkness]], he doesn't comprehend what Sedna truly is and gives wrong information as a result.
* LastEpisodeThemeReprise: Inverted, as the theme plays at the beginning of the last episode in a more somber tone as [[spoiler: Marin and Kanon are near death]].

* LoveHurts: This is Oshima and Kanon's situation in a nutshell.

** Oshima initially seems to be your classic AlphaBitch, but she has ''heartbreaking'' hidden depths. She tells Kanon that even when she was going out with Kojima, all he ever talked about was Kanon. She feels she'll never measure up to Kanon in his eyes, and that it ''hurts'' to like someone that much knowing they'll never feel the same way about you.
* MadeOfEvil: [[spoiler:Sedna, though not so much evil as sadness]].

* MoreThanMindControl: By the end of the series, the heroines realize that [[spoiler: Sedna's darkness was really just magnifying the weakness that was already present in people's hearts]].

* OlderAlterEgo: A villainous version. [[spoiler:In the final episode, Sedna possessing Urin causes her to age into a young woman]].

* ThePowerOfLove: This is how Marin and Kanon save Urin from Sedna. [[spoiler:Instead of defeating Sedna with a spear of light and killing Urin, her host, Marin and Kanon reach out to her. They hug her, and the power of Marin's love and Kanon's acceptance of darkness moves Sedna's heart and causes her to disappear peacefully]].

* RedEyesTakeWarning: Averted with Kanon and the shrine maiden, but played straight with [[spoiler: a corrupted Urin]].
* RedHerring: The Elder Turtle is often wary of Kanon and is convinced she will fall into darkness if not watched. [[spoiler:He's wrong. Marin does]].
* RedemptionEqualsDeath: [[spoiler:Urin believes this in the finale, but she's convinced otherwise and saved]].

* TheReveal: Kanon and Marin find out about Sedna's true nature while being almost defeated by her. Specifically, [[spoiler:Sedna is formed from the combined sorrow that the inhabitants of the island committed to the sea]].

* BalanceBetweenGoodAndEvil: This turns out to be a crucial part of the series, as [[spoiler: the islanders' unwillingness to accept and deal with the sorrow in their hearts created Sedna]]. In the end [[spoiler: the darkness is accepted by them and becomes one with the light]].
** Somewhat subverted on account of the fact that [[spoiler: Sedna is not actually evil or good, it is merely sorrow, and rather than "balance" the issue is accepting one's sorrow and joy alike.]]

* BittersweetEnding: [[spoiler:Kanon and Marin defeat Sedna, but have to separate since land and sea people are not supposed to be together. It is hinted that Kanon will keep looking for Marin]].
** In the DVD special it becomes clear that [[spoiler:Kanon keeps longing to meet Marin again. She even seems to get her wish for a while, which makes things even more bitter]].

* CantCatchUp: Kanon struggles with this, feeling inadequate at times.

* DarkIsNotEvil: Kanon's evil aura doesn't make her evil; it grants her immunity to Sedna's evil.

[[IThoughtItMeant Not to be confused with]] the ''[[{{Lightnovel/Bakemonogatari}} Monogatari]]'' series.

Under the sea, two mermaid sisters by the name of Marin and Urin are enjoying their life devoting full time to floating. One day, a ring falls from the surface and into Marin's hands. She wants to find the ring's owner and return it, and takes Urin along for the ride. It's then that they run into Kanon Miyamori, a young priestess who's about to get involved in a series of events neither she nor the sisters could've planned for when Urin ends up unleashing Sedna, an evil force intent on shrouding the world in darkness. This is what prompts Marin and Kanon to become the Priestess of the Sea and Sky.

* BrattyHalfPint: Urin is this mainly towards people on land.

* {{Miko}} {{Magical Girl Warrior}}s: Marin and Kanon.

* ArcWords: "I love you!" crops up very frequently throughout the story as Marin and her relationships change.

* BonusEpisode: The bonus 13th episode in which [[spoiler:Marin and Kanon have a near-encounter after the series]].

* YouGottaHaveBlueHair: Kanon's hair is a dark blue color, but becomes a lighter tone when she transforms. Played straight with Warin.

* imageSong: Marin, Kanon, and Urin get them in a drama CD and an OP single, "Treasure."

* imageSong: Marin, Kanon, and Urin get them in the OP single "Treasure."

* SatelliteLoveInterest: Kojima, who never gets much more background than that Kanon likes him.