The Neo-Soviet marine biomods
Greentails, sirens, mermaids, merfolk, the creature you think of when you hear these names is a Tangaroa.
Duck-Billed Bird-Dog. This creature has the hindquarters of a hunting dog such as a Labrador Retriever, and the forequarters of a duck, including webbed feet and a wide beak. It also has the wings of a duck.