The aim of present paper is to investigate the heat/mass and motile microorganisms transfer rates in the convective stretched flow of nanofluid consisting of nanoparticles and gyrotactic microorganisms. Magneto nanofluid in presence of an inclined magnetic field is adopted. Idea of microorganisms is employed just to stabilize the suspended nanoparticles through bioconvection which has been induced by combined effects of buoyancy forces and magnetic field. Further interesting aspects of Brownian motion, thermophoresis, viscous dissipation, Joule heating and stratification are examined. Convergent solutions for the obtained nonlinear differential systems are derived. Main attention through plots is given to the influences of sundry variables on the velocity, temperature, concentration and motile microorganisms density. Numerical values for the skin friction coefficient, local Nusselt number, Sherwood number and local density number of motile microorganisms are computed and analyzed. Comparison is also made with limiting published results from open literature and an excellent agreement is noticed. (C) 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.