Why do cave fishes lose their eyes?
The genes in cave fishes work the same way. The fact that cave fishes don’t use their eyes has no effect on their genes. Instead, cave fishes are blind because something happened to the genes that control the development of their eyes. This change is passed on from parent to offspring.
What adaptations do cave fish have?
Their lack of eyes and pigmentation, elongated fins and increased numbers of skin sensory organs, such as taste buds and neuromasts, are all convergent traits that permit cavefishes to survive in subterranean habitats.
Do cave fish lose their eyes?
Blind cavefish (Astyanax mexicanus) lose critical eye tissues within a few days after their eyes begin to develop. According to a new study, this loss of eye tissues happens through epigenetic silencing of eye-related genes.