I believe they do hide, unless you're asking something else? Until you run into a predator, they will be hidden. There is a Difficulty Setting that can change the hidden status if you want to see Consensual Predators on the map instead of inside Apex Predators.
Viewing post in Amelia's Stranded Adventure comments
I mean, it would be interesting if there was a button that could turn off the visibility of all characters on the map, and when pressed, they would all disappear and not reappear, even after Amelia gets eaten, but I think that would only work with random enemy positions, since there aren't many enemies and their positions are easy to remember.