A giant insect species who guards the Sea of Corruption. They live in larger groups and are easily provoked if one of their own kind gets injured.

Humanity, in its hubris, has precipitated a devastating environmental disaster. Flourishing industrial civilizations have been swallowed up by the Sea of Corruption, an enormous forest of fungi releases a miasma of poisonous spores into the air. Nausicaa, a compassionate young princess, and her allies battle to heal a wounded world and its inhabitants...
 
(Source: Viz Media)
 Note: Won the 26th Seiun Award for Best Comic (1995).

A thousand years after a global war, a seaside kingdom known as the Valley Of The Wind remains one of only a few areas still populated. Led by the courageous Princess Nausica&auml;, the people of the Valley are engaged in a constant struggle with powerful insects called ohmu, who guard a poisonous jungle that is spreading across the Earth. Nausica&auml; and her brave companions, together with the people of the Valley, strive to restore the bond between humanity and the Earth. 
(Source: Disney)

Oomu