I apologize for the bad formatting, but when I saw this thread I had to make a account to necro off of this question. For my reply to make sense, I first have to walk through how I believe the Inkling/Octoling biology is. I personally believe they the following main qualities that are important to this argument. Firstly, that they actually have no solid organs at all, and are kept in shape by the pressure of the ink inside the squiddo. This ink has three purposes, which are to function as a non-stabilized neural network held in the sac that is the Inkling's body, to function as a stomach acid which allows them to consume nutrients, and to keep them from just deflating. This theory explains how they function without bones and such, how they can 'respawn' (they just rematerialize a sac from the surrounding environment), and how their weapons work. Their weapons aren't actually held by the Inklings, but are actually a device that partially alters the squids DNA, allowing it to form those weapons out of their own ink. This is technically a minor alteration of DNA, and the fact that Inklings have what appear to be wars for sport against people with different ink colors (caused by small genetic modification), probably lead AI man to believe that they were fighting over tiny genetic differences. This theory also combines the fashion into actual genetic differences caused by devices similar to the ones that alter ink color and weapon selection.