I followed up your comment by looking for The Secret of Kells. I seem to recall this being around but for some reason didn't see it. I found it on YouTube and hope it's a 'good version' otherwise I'll figure out a way to download or rent it. Thank you.

Have you seen Mononoke No Hime? Or 'Princess Mononoke?' I haven't. But came across it regarding the word 'holobiont.'