Please allow me to compliment you on this gallery of excellent work; I admire your ability to create a most unearthly gallery of creatures from Earthly elements and would truly love to pick your brain on the subject, if you would be willing to share some thoughts and accept a high risk of my own ideas being thrown into the mix of any discussion.
In any case Keep Well and please do Keep up the Good Work!
This is a very awesome project, seriously, it is. Although these being aliens just makes little sense. Sure convergent evolution could of happened to make these animals but what is the likeness of that happened. If I were you, I would make these genetically engineered animals introduced to a terraformed planet and showing their descendants.