Kuramon

Kuramon (クラモン)
An Unidentified Digimon that suddenly appeared on the Computer Network. The aggression generated by the malice of people who abuse the Computer Network, and the conflicts which are unfolding on the Network, manifested and a single Digitama was created. Humanity's destruction instinct is condensed within that Digitama, and as such the mysterious Digimon that was born from it is a very dangerous being. It multiplies like a virus within the Computer Network, causing a slight degree of network failure. Its Special Move is producing a frothy substance from its gigantic eye (Glare Eye).

Etymology
Kura: From kurage 「水母（クラゲ）」, which means jellyfish.