In The Dark, Cave Fish Follows Its Own Rhythm

Summary: The Somalian cave fish called the Phreatichthys Andruzzii has its own sense of rhythm and time. Its inner timekeeper has about a 47-hour cycle. This cycle works by food rather than sunlight. Scientists say this will teach them more about why clocks are important to living things and how they live when their cycles are no longer related to the movement of the sun. “Somalian cave fish have been cut off from the sun for up to 2.6 million years.” Because of this they fish’s eyes, scales, and also its skin coloring has disappeared. In lab tests the cave fish did not react to the 12 hour light and day cycle.

Critique: I thought that this was well written and it was understandable. It grabbed my attention just by the picture and the title.

Impact: This has an impact on the scientists work. They said that it will teach them more about living organisms and the way they clock are important to them and how they live a daily life when their cycle doesn’t have to do with the rising and setting of the sun.

Reference: http://www.sciencenews.org/view/generic/id/334056/description/In_the_dark%2C_cave_fish_follows_its_own_rhythm