Red Toads are first encountered as members of Master Anura's forces in Hana valley. They are fairly weak, but still attack Chibiterasu with all they have. They have the common depiction of a toad with skin of varying shades of red, and a lizard-like frill on its neck.
The Red Toad is not an actual animal, but rather an incarnation of rage and murder. It dwells in river bottoms and tends to feed on children and small animals, but it does so by instinct and not by its own evil. They apparently gain intellect from their prey, and older toads can become highly intelligent.
"This amphibian is the incarnation of rage and murder that dwells
at the bottom of rivers. Its usual victims are children and small animals.
It does this out of instinct and not out of evil design.
Some older Red Toads display uncanny intelligence. It is not known how
many victims were consumed to achieve that degree of intellect."