Wikipedia sayings about the protective shell that encloses the insect egg is called what?

1.Angels in Neon Genesis Evangelion

Sachiel's attack in the third episode "A Transfer". Shamshel has a vaguely insect-like appearance and its form fuses that of a mollusk and that of a cetacean

https://en.wikipedia.org/wiki/Angels in Neon Genesis Evangelion

2.Influenza

that cause severe illness. Symptoms of HPAI infection include lack of energy and appetite, decreased egg production, soft-shelled or misshapen eggs,

https://en.wikipedia.org/wiki/Influenza