The Qilin or Kirin is commonly depicted as:
- having a reddish orange mane
- resembling a horse
- having a branch like horn
- have goat hooves
- are herbivores
- being a dark seafoam green coloration
- having a somewhat long tail ending with a horse tail
- are covered in something which resembles fish scales
- have have what appears to be a beard and eyebrows
- will actively try and avoid harming any creatures
- are solitary
- are semi-aquatic
Given these characteristics, what species could the Qilin have evolved from, and what evolutionary pressures would lead to such a being?