| Life History & Behaviour
 
(i) Locomotion  Polyclads are able to achieve a wide range of movements especially while swimming and gliding on surfaces. (ii) Reproduction - Mating:Penis fencing strategy Polycladscarry out an interesting mating behaviour known as "penis fencing".Watch the video under "Reproduction".
 
 
  				 
 
 
 
 
 
 
 (iii) Feeding & Nutrition
 
 (iv) Internal Transport System
 
 
 								 
 
 
 There are no specialized organs for respiratory functions in polyclads. Gaseous exchange occurs across their entire body surface through diffusion. See "BodyWall". 
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