Wow! Great detective work Chris! Thanks so much! It's nice to know that I don't have a detrimental beast wandering around in my tank. This guy definitely has rolled rhinophores and the parapodial wings. I have no idea where it came from but I would guess it's from the Indo-Pacific making it the Elysia obtusa variety. Thanks again for taking interest and going the extra mile to help out!
Cheers,
Aubrey