Contact: Kelly Blake University of Maryland Caption: A cavefish
(left) and surface fish (right) swimming in assay chambers in
the presence of a 50 Hz vibrating rod. When the rod is vibrated,
the cavefish, but not surface fish, were strongly attracted.
Credit: Masato Yoshizawa Usage Restrictions: Credit: University
of Maryland, Masato Yoshizawa. Related news release: Adapting to
darkness: How behavioral and genetic changes helped cavefish
survive extreme environment