﻿Smithsonian 
  Report, 
  1943.- 
  -Friedr 
  

  

  Plate 
  

  

  1. 
  Swimming 
  fish 
  with 
  "normal" 
  coloration. 
  

  

  2. 
  Resting 
  fish 
  changing 
  its 
  pattern 
  to 
  simulate 
  surroundings 
  

  

  Nassau 
  Grouper 
  (Epinephelus 
  striatus), 
  a 
  Fish 
  That 
  Alters 
  Its 
  

   Coloration 
  in 
  Keeping 
  With 
  its 
  Background 
  When 
  at 
  Rest. 
  

  

  (Photographs 
  by 
  Longley 
  and 
  Hildebrand.) 
  

  

  