What are these creatures? They are rainbow sea slugs (Babakina anadoni), usually found in warmish… Posted on October 11, 2025 by Saint Jermaine natureisthegreatestartist: What are these creatures? They are rainbow sea slugs (Babakina anadoni), usually found in warmish Atlantic waters but now found as far north as the UK. Bizarre and beautiful, right? Go to Source Author: