Equation for 3D graphing of ellipsoid with that has 2 open ends opposite each other

The equation (X^2)/25+(Y^2)/25+(Z^2)/2=1 yields a 3D ellipsoid figure on WolframAlpha. However I am trying to find out how to enter an equation that will give me a form with the ellipsoid op开发者_开发知识库en at 2 ends. One way would be to restrict the domain of x such that x is between -3.5 and 3.5 . But I can't figure out the notation for that in the WolframAlpha text box. Any suggestions?

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This is the code for Mathematica. It happens to work in Wolfram Alpha also. (It's not generally true that Mathematica code runs in WA.)

ContourPlot3D[x^2/25 + y^2/25 + z^2/2 == 1, {x, -3.5, 3.5}, {y, -5, 5}, {z, -5, 5}]