Aquaman, Aquatic Sorceror, Wannabe Pirate

[Reyna 93]

So I'm currently in a pathfinder pirates game, using the skulls & shackles adventure model. I opted for aquatic bloodline sorceror because it seemed thematically appropriate, and it was long before I was jokingly nicknamed Aquaman.
After just reaching level 3 and almost having acquired our own ship, I need some advice on spells to take now and in the future.
Obviously this isn't some pro-optimized build, so do you have any suggestions on spells useful for a nautical setting, water- themed or otherwise?
Any other build advice is welcomed too.
Much thanks.

[Azelyan]

Seaborn Wild bloodline might be more fitting. What race? Merfolk, Human?

[Reyna 93]

It's mostly pirate based so I went with human
Where might I find Seaborn bloodline and the wild variant?

[Azelyan]

http://www.d20pfsrd.com/classes/core-classes/sorcerer/archetypes/paizo---so rcerer-archetypes/wildblooded/seaborn