  We investigate the uniform regularity and vanishing viscosity limit for the
incompressible chemotaxis-Navier-Stokes system in a smooth bounded domain
$\Omega\subset\mathbb{R}^3$. It is shown that there exists a unique strong
solution of the incompressible chemotaxis-Navier-Stokes system in a finite time
interval which is independent of the viscosity coefficient. Moreover, the
solution is uniformly bounded in a conormal Sobolev space, which allows us to
take the vanishing viscosity limit to obtain the incompressible inviscid
chemotaxis-Navier-Stokes system.
