  We study BiHom-Novikov-Poisson algebras, which are twisted generalizations of
Novikov-Poisson algebras and Hom-Novikov-Poisson algebras, and find that
BiHom-Novikov-Poisson algebras are closed under tensor products and several
kinds of perturbations. Necessary and sufficient conditions are given under
which BiHom-Novikov-Poisson algebras give rise to BiHom-Poisson algebras.
