User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6050823-20130929143326/@comment-4212769-20130929150224

It's much more likely that they really are subspecies simply because they have different ways of living. A mutation doesn't make an animal completely different. There has to be evolution that brought Ivory to go more often and further on land. Same the Abyssal Lagiacrus, it needs to adapt to the pressure in the deep sea and it has to learn what is prey and how to hunt it. Again sign of evolution.