Post story(epilogue):
>so all good things happen in the end
>our little protagonist Blue Star found himself flowing his fins and tail with a new life. A life after the party. It wasn't a party but a rediscovery for their species.
>he promoted the seapony image again and actually attracted some important figures after spending a couple of weeks down there
>hippogriffs gave him some honor because of giving that personal effort to them and he was welcome and even offered a job as a guard for Seaquestria
>he found some relief and purpose to his life finally after a mid life identity crisis
>staring on a rock was all he could do. He thought he had failed and saw himself retiring for the defense of this world

>so, the actual party got its own celebration,with Skystar and Pinkie under command,reaching levels of Rainbow Dash's birthday
>it was overwhelming,the party spirit was there,far away from Ponyville. That language feels universal,everyone out there believes in the word fun and optimism.
>even Rarity had a date with an hippogriff. They danced together,bending their bodies as if they were floating in space. At some point,they composed the form of a heart. Maybe our little blue OC wasn't the only one who had found love here...huh? Either way,what a form to shine with absolute fabulousity, like a pearl in the seafloor,these two delivered a very valuable moment worth to watch.

>something magical happens in that place and no longer feels that it could threaten anypony. The seas were even more protected and hippogriffs guarded their coasts and prevented normal ponies to get drowned. That should explain the Blue Star recruitment for that job. He had the experience,now he wanted to help others from the bottom of his heart, now with a mare to listen his own fears and existential thoughts.

so,what is it now? Does the sea bring more problems? It seems the south part of Equestria has reinforced and established a bright future,a future of harmony. Maybe, the darkness isn't found underwater,maybe the seas are not the thing we are looking for,considering that we have ambassadors,loyal defenders of the sea; there's not much left for us to get here.
Only nice parties,some ponies having illusions to transform, some seamares dating earth ponies. As fairy tales usually tell: they swam together and shoo be looved each other forever....