The protagonist was a cute little crab! And he got a starfish friend, who was a ninja! It was adorable!
Unfortunately, it was also very wordy and kinda bloated. I kept getting back to the book because I've just finished Rimmel's Noobtown series and wanted more of the same, but sadly, this was nowhere near as good.
It really was cute, though; and the world was interesting. (It also clearly has deep worldbuilding behind it, which I tend to like; but maybe there was too much of it crammed into too little other stuff.)