Fantastic! I love the names of things here, and I can tell you have a lot of fun with language. Pishtosh Imp! Daptorkin going Lopar! Great stuff. And the marine life inspirations are fantastic as well. But even moving past the writing, there's a lot of great game-design stuff here: the Engram detector is great, as are the little encounter tables you've done. The Stonemire one in particular is nice design.
My buddy sent me this one over Discord. Said it was right up my alley, and he was totally right. I'd love to run this. Sometimes I read these and think 'I wish this got to unfold into a full adventure'. This doesn't need that. It is a full adventure. What I would wish for is a whole book full of adventures like this, set in this world.