I am shamefully slow with this update, but here it is finally: my review!
And now I am remembering why I try to be good about writing this right after I finish the book...because now I don't remember as many details!
I will say I enjoyed Dark Life a lot. The world (or rather, ocean) it takes place in is unlike any other book I've read. Kat Falls creates many new technologies to enable the characters of Dark Life to live beneath the surface of the ocean. Things such as "liquigen", bubble fences, and underwater jellyfish-style houses may seem fanciful at times, but are a unique solution to the problem of how exactly a group of humans would live and farm under the sea.
The villains are creepy, and certainly surprising, while the main characters are varied and interesting. I'm not sure if this book is a series, but I wouldn't mind reading more about this underwater world.