CHARACTERISTICS OF VALUABLE MARINE FISH IS 



57 



are behind the breast fins, and the first dorsal is only represented 

 by separate spines : there are no scales but bony plates. Only 



FIG. 25. The Thick-lipped Grey Mullet. 



one species lives in the sea, namely the fifteen-spined stickle- 

 back (Fig. 26). 



FIG. 26. The Fifteen-spined or Sea Stickleback. 



The wrasses are distinguished by possessing an extended 

 dorsal fin the greater part of which is spinous, by having strong 



FIG. 27. The Common or Ballan Wrasse. 



crushing teeth in the throat, and thick fleshy lips over the jaws 

 (Fig. 27). They are shore fishes which live in the neighbourhood 



