"Sebae" is just a generic name used in the industry. There are no actual "sebae" anemones. They are either H. malu or H. crispa.
In this case it looks like a malu based on general appearance and the rings on the tentacles. If the colors in the pic are accurate I am not convinced it is dyed. Dyed anemones are usually brighter than that. But if the entire column is yellow, then it is likely dyed, but it was either a quick job or the anemone has expelled a lot of the dye over time. If just the rim of the foot is yellow then it could be the normal color for the nem. I had a brown malu that had a bright yellow foot (but a white column).
Dyed anemones can survive when given proper care. Proper lighting and water conditions can bring them back like most other bleached anemones assuming the nem is otherwise healthy.