WHAT AND HOW DO FISH SEE?

Asian Diver (English) - - Front Page -

The struc­ture and ca­pa­bil­i­ties of a fish eye show clear adap­ta­tions to its vis­ual en­vi­ron­ment.

Like in most ver­te­brates, a fish eye con­tains light-sen­si­tive vis­ual pig­ments. Each pig­ment ab­sorbs a dif­fer­ent wave­length from the spec­trum, al­low­ing the be­holder to per­ceive dif­fer­ent colours. The per­cep­tion of colour also de­pends on the view­ing dis­tance, depth and the back­ground of the ob­ject in fo­cus.

Depend­ing on which wave­lengths of light are able to pen­e­trate through the wa­ter, light determines to a sig­nif­i­cant de­gree what colours fish can see and how their own colours look to the eyes of their neigh­bours. For ex­am­ple,

Newspapers in English

Newspapers from Singapore

© PressReader. All rights reserved.