Fig. 6. Regression lines for the tail length (A), pleuroperitoneal cavity (PPC) length (B), body mass (C) and liver length (D) against total body length in normal and giant X. laevis tadpoles. The tail in giant tadpoles retains normal allometric proportions. Giants had significantly longer relative visceral cavities, and were relatively more massive than normal tadpoles. The liver is the only organ in giants that shows a slower increase in length with the increase in the total body length, compared to normal tadpoles. All regressions are significant (P<0.05) except for the liver length in giants (P=0.49).