catenoid[u_, v_]:={ Cosh[u] Cos[v], Cosh[u] Sin[v], u}
enneper[u_, v_]:={3 u + 3 u v^2 -u^3, -3 v -3 u^2 v +v^3, 3 u^2 -3 v^2}

grcatenoid1=ParametricPlot3D[catenoid[u,v] //Evaluate,{u, -2,2 }, {v, 0,2 Pi},  Boxed->False, Axes->False]

grcatenoid2=ParametricPlot3D[catenoid[u,v] //Evaluate,{u, -6,6 }, {v, 0,2 Pi},  Boxed->False, Axes->False]

grenneper1=ParametricPlot3D[enneper[u,v] //Evaluate,{u, -3,3 }, {v, -3,3},  Boxed->False, Axes->False]

grenneper2=ParametricPlot3D[enneper[u,v] //Evaluate,{u, -10,10}, {v, -10,10},  Boxed->False, Axes->False]