Mothra is a giant monster Butterfly
When ever Mothra dies she is reborn as a caterpiller and the caterpiller sprays this thing on the dead body of its parent. Soon the Caterpiller wraps it self in a cocoon after a few days Mothra comes out of the cocoon.
Mothra and Godzilla
Mothra and Godzilla (Japan) have been enemies and partners loads of times. The have fought many monsters to gether.