ParametricPlot3D with tube and arrow

I have this: f[x_, y_] = x y/(x^2 + y^2); ParametricPlot3D[{t, 2 t, f[t, 2 t]}, {t, -1/2, Sqrt[0.002]}, PlotStyle -> Directive[Red, Thick]] /. Line -> Tube Which works, but I would like an

Source: ParametricPlot3D with tube and arrow

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