A Cat with axolotyl tail and external gills. 

Super cute at about hand scale as a desk monster. 

Day two sculpting to add toes to the paws, light whiskers and clean up the face.  Subtle but substantial upgrade.

Day three added a fresh support-free print.  Not sure which I like, but now I have a lott'l.  See https://www.printables.com/model/802436-cat-olotyl-no-support for the easy print ones.