[jpm_sd]

There is a whole industry springing up around this idea, it's known as "MCDR" (marine CO2 removal). Some startups:

https://www.heimdalccu.com/

https://www.vesta.earth/

https://www.ebbcarbon.com/

https://www.planetarytech.com/

https://capturacorp.com/

https://www.runningtide.com/

https://www.climatefoundation.org/xprize.html