River Piranha Plant

River Piranha Plants are sub-species of Piranha Plants that appear in New Super Mario Bros. Wii. They appear in World 5-1 as common enemies. As their name implies, they live in rivers. When Mario isn't around, they blow green spike balls like a Ptooie's method of attacking. When Mario approaches, however, they suck in and bring the spike ball to their lips and slowly blow it upwards to attack. Just like regular Piranha Plants, they can defeated with fireballs or a Starman. the spike ball is invincible and cannot be destroyed.