Here heat, concentration and motile microorganism transfer rates in magnetohydrodynamic (MHD) radiative flow of nanofluid are investigated. Variable thicked rotating disk is examined. Concept of microorganisms suspended nanoparticles is stabilized through bioconvection. This concept is induced by combined effects of magnetic field and buoyancy forces. Nonlinear differential systems are solved for series solutions. Velocity, temperature, concentration and motile density behaviors for different parameters are analyzed. Skin friction coefficient and Nusselt number are numerically discussed. Temperature and concentration have opposite behavior for larger Brownian motion parameter. Motile density reduces for bioconvection Peclet number and bioconvection Lewis number.