Nudibranchs are charismatic marine invertebrates whose vibrant colors appear strikingly exposed and vulnerable while secretly harboring a nasty punch of distasteful chemicals. I use vision models to ‘see through the eyes of fish’ to find which nudibranchs are most visible to predators and chemical ‘taste tests’ to see which are most distasteful. I then use this info to make comparisons amongst species and test evolutionary theories.