Gnarantula

A Gnarantula is a cloud-covered arachnid found in Mario & Luigi: Partners in Time. The cloud hides the monster's body; when attacked, a Gnarantula's true form will be revealed. In fact, there are two types of Gnarantulas: the green, spiked Gnarantula and the orange, spike-less Gnarantula. As the cloud conceals its body, it is unwise to jump on a Gnarantula until its true form has been revealed. Otherwise, one might accidentally be damaged by the green Gnarantula's spikes. Of course, the orange variety can be jumped on. The green variety is vulnerable to fire attacks, while the orange variety is vulnerable to ice. To attack, a Gnarantula will jump then jump again in mid-air, eventually falling to the ground and crushing an opponent. This attack can be countered with a Hammer strike. Gnarantulas live in the clouds high above Yoshi's Island.