CHARACTERISTICS OF FISHES 



Fins 



The appendages of fishes may be considered analogous to the Umbs 

 of mammals. They are normally two pairs of lateral fins: the pectorals 

 which He just behind or below the gill opening, and the pelvic or ventral 

 fins which lie near the median ventral fine. The pelvics may be positioned 

 well back on the fish as in the sharks, herring, and salmon, or forward 

 near the pectoral fins, such as in the tunas (Figure 1.2b). Fins on the 



Figure 1.2. (a) Moray eel (Gymnothorax mordax). (b) Albacore tuna 

 {Germo alalunga). (c) Pacific true cod {Gadus macrocephalus) . 



