Casimir ghosts (introduced by physicists Arnaudon, Bauer, Frappat and further studied by the mathematician Gorelik) are very interesting objects which must be used in addition to usual Casimirs in $Z/2Z$-graded (i. e. supersymmetric) situations. We relate Casimir Ghosts to invariant integration and Berezinians on symmetric spaces in supergeometry, and give applications. This is a joint work with Emanuela Petracci.