A Sea Cactus is an underwater creature that lives in Yoshi's Island oceans. Sea Cacti only appear in the game Yoshi's Story for Nintendo 64. Sea Cacti have spikes all over their bodies and if Yoshi collides with one, Yoshi will take some damage. They come in three sizes: big, medium, and small, and are normaly seen in groups, which can be quite a nusiance. Sea cacti seem to be able to survive outside of water, although, they only time they are seen on dry land they are next to a river. Sea cacti also can hang off ceilings, and if Yoshi walks under a sea cacti it may let go and drop on top of Yoshi. Sea cacti swing their bodies back and forth and cannot be hurt. If Yoshi throws and egg at one it will harmlessly ricochet off the Sea cactus. Sea cacti seem to have no harmful intent and are more of an obstacle than an enemy. Sea cacti only appear in the levels of Yoshi's Story, Lots O'Jellyfish!, Lots O'Fish!, and Neuron Jungle.
 Colors of the Sea Cacti
Although there are many color variations of Sea Cacti, none are more powerful than the other.