SHORE FISHES. 257 



of a little rock-fish, one of the numerous tribe of Gobies. 

 Several of them occur in the pools, among them the Rock 

 Goby (Gobius niger), or Black Goby, as he is more often but 

 inappropiately named, for he can scarcely be said to have any 

 permanent colour when his hues constantly change as he 

 changes his surroundings. Living among rocks he is more 



LITTLE GOBY. BUTTERFLY BLENNY. 



often brown than black, with lighter and darker mottlings 

 according to circumstances. 



The reader is advised to make himself .acquainted with the 

 names of the various fins, and to count the rays in each, for 

 these vary with the species, and are often used in describing 



