From the Super Mario Wiki
Retrieved from "http://www.mariowiki.com/index.php?title=Spike_Bass&oldid=1938280"
The Spike Bass appears in World 2-A and World 3-C , a Spike Bass jumps from the water and tries to attack Mario, extremely similar to Boss Bass (sans swallowing Mario whole). This enemy can be defeated with a Fireball, a Koopa Shell, a Starman or a Mega Mushroom. However, once defeated, another Spike Bass will return after a few seconds to continue the pursuit.