The rutiodon drowns iguanodon killing it

Rutiodon weighted like a ton while Iguanodon could Reach up to 4-5 tonnes. Dragging an Iguanodon into the water would be imposible for the Rooty boi.

Yeah but think of it this way too rutiodon waits in water iguanodon goes for water rutiodon rips the head off of the igua killing it is another way it could go down