Tadpoles of the Surinam horned frog attack each other (and tadpoles from other species) soon after being hatched.
This species was once considered the same species as
Ceratophrys ornata. This dispute was later settled because the Surinam Horned frog inhabits a different habitat than its smaller cousin and does not interbreed with it in the wild (but will do so in captivity). This species has been known to prey upon the other species of horned frog, especially the northern race of
Ceratophrys ornata.