This plant is not Aloe zebrina, which has different inflorescences (tall, cylindrical and laxly flowered racemes). I would not be able to identify this aloe based on a single picture but it would seem to more closely resemble Aloe maculata. Even that is hard to be sure about without seeing the leaves.
I would like to move this image to the generic listing for Aloe, unless you have more specific information. Please let me know what you think.
