Anyone know of any good plot oriented manga with an aquatic theme? Like sea monsters, ship...

https://www.mangago.me/read-manga/deepwater/

I know a few, depending on what genres you like. Here's several completed ones I've read before:

Kaijuu no Kodomo/Children of the Sea
Genre: Seinen/mystery/supernatural
Comments: This one has a movie too. Very pretty art.

Aoi Uroko to Suna no Machi/Mermaid Scales and the Town of Sand
Genre: Josei/mystery/slice of life
Comments: This is very short (11 chapters) and has an interesting/cute art style.

School Ningyo/School Mermaid
Genre: Shonen/horror
Comments: This is kinda a cult horror manga classic with interesting visuals. It's more so a series of one shots than a proper narrative.

Crimsons: Akai Koukaishatachi/Crimsons: The Scarlet Navigators of the Ocean
Genre: Shonen/adventure/educational (kinda)/comedy
Comments: This one is pretty silly and stupid. It's an adventure story about the life of salmon.

Umi no Cradle/The Cradle of the Sea
Genre: Shonen/Historical/gender bender
Comments: This is a navel adventure story that's pretty short (23 chapters).

Suiiki/Waters
Genre: Seinen/fantasy/historical
Comments: This is more about rivers than the ocean. It's by the same author as Mushishi, so the art is stunning.

Silent Blue
Genre: Josei/mystery
Comments: More about a lake and also very short (6 chapters)

Ningyo Ouji/Mermaid Prince
Genre: Shojou/psychological
Comments: This is 3 chapters and the first story in an anthology.

Kaikisen/Return to the Sea
Genre: Seinen/mystery
Comments: You might want to find this elsewhere since not all the chapters are here. It's Satoshi Kon.

Gyo
Genre: Seinen/Horror/Psychological
Comments: Juju Ito sea horror

Aqua Knight
Genre: Seinen/action/fantasy
Comments: Not really complete (indefinite hiatus). This is Alita Battle Angle but with orcas.

Suisei no Gargantica/Gargantia on the Verdurous Planet
Genre: Shonen/mecha/action
Comments: This has an anime. It's like if they added mechas to the movie Waterworld.

I haven't read a lot of these in a very, very long time, so my memory may be a bit hazy. Hopefully something sticks out to you!

Thank you! First chapter looks pretty cool!

Thanks!! These look really good

Try this one shot !
https://www.mangago.me/read-manga/the_specific_heat_capacity_of_love/

Thankuuu!

https://www.mangago.me/read-manga/mikane_and_the_sea_woman/ I think

Awh dang you’ve already read this. :( I’ll try to find something else hold on

https://www.mangago.me/read-manga/spirits_of_the_sea/ Second times the charm

omg tysm!! The beginning is exactly what I was picturing when I asked for sea monsters, looks really neat.