Predator Deer - Water Creature Design

For this project I designed and sculpted a water creature, it's a predator which has the aspect of a deer.
I worked on the anatomy of the shoulders to give him the possibility to use his arms outstretched, like fins but also to use them to swim like a dog
I immagined how did it worked on the practical side, using the tail to change direction like a shark and using his legs as a crocodile