 Typically , juvenile cane toads have smooth , dark skin , although some specimens have a red wash . Juveniles lack the adults ' large parotoid glands , so they are usually less poisonous . The tadpoles are small and uniformly black , and are bottom @-@ dwellers , tending to form schools . Tadpoles range from 10 to 25 mm ( 0 @.@ 39 to 0 @.@ 98 in ) in length . 
