The chrysalis (or pupa) is the transformation stage within which the caterpillar forms a protective shell around its body so it can change forms from a caterpillar to a butterfly. Once the caterpillar is fully grown the shell splits open.
The chrysalis (or pupa) is the transformation stage within which the caterpillar forms a protective shell around its body so it can change forms from a caterpillar to a butterfly. Once the caterpillar is fully grown the shell splits open.