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Focusing on the rotating black hole (BH) surrounded by the anisotropic fluidmatters; radiation, dust, and dark matter, we study the massive scalarsuperradiant scattering and the stability in the Kiselev spacetime.Superradiance behavior is dependent on the intensity parameter of theanisotropic matter $K$ in the Kiselev spacetime. By adopting the manifest oflow-frequency and low-mass for the scalar perturbation, we find $K<0$ enhancesthe superradiance scattering within the broader frequency range, compared to$K=0$ while $K>0$ suppresses within the narrower frequency range. As a result,the radiation and dark matter around the rotating BH act as amplifier andattenuator for the massive scalar superradiance, respectively. This is whilethe dust has a twofold role because of admitting both signs of $K$. Throughstability analysis in the light of the BH bomb mechanism, we show in thepresence of dark matter, the instability regime of standard Kerr BH ($K=0$)gets improved in favor of stabilization while the radiation and dust do notaffect it. In other words, by taking the dark matter fluid around BH intoaccount, we obtain a broader regime that allows the massive scalar fielddynamic to enjoy superradiant stability.

Superradiance and Stability of Kerr Black Hole Enclosed by Anisotropic Fluid Matter