Camouflage Foi

The camouflage foi diverged from their freshwater ancestors about 20,000 years after their ancestors first re-emerged from the subterranean waterways, adapting first to the brackish water of Wright, and then eventually the greater tropical coasts beyond. They are functionally the same as their distant marine ancestors, living simple lives on the ocean floor vacuuming up food that they pass over. They have become accustomed to the salinity, and function within a range between 2.1 to 3.7 %. Ion channels along the cell membranes of these creatures constantly maintain equilibrium, but this appears to require an enormous energy expenditure, which results in rather sluggish behavior compared to their freshwater and subterranean relatives. They prefer environments with slower currents and tidal forces, slithering along the seabed at a top speed of 0.25 kph.

They are mostly transparent, which provides some protection, but due to its lack of otherwise natural defenses and limited mobility it appears the best manageable. In low light conditions they are nearly imperceptible to organisms with a typical color vision range, and only limited detection appears when these organisms are moving. Their eyes have seen partial functionality return, allowing them to detect changing light levels above them. This allows them to seek out shaded or otherwise dim light areas, though their vision does not appear complex enough to distinguish between dim light area and dark bodies organisms. They have been shown to seek out the darkest objects in their field of vision, occasionally leading them directly into potential predators that are resting on the seabed.