DescriptionHaswell's Frog - Paracrinia haswelli tadpole.jpg Tadpole of Haswell's Frog (Paracrinia haswelli) Date 15 February 2008 Source Own work Author...
wikimedia.org/wiki/Tadpole#mediaviewer/File:Haswell%27s_Frog_-_Paracrinia_haswelli_tadpole.jpg http://www.biozoomer.com/2014/02/frog-heart-structure-fish-heart...