wow! never seen this before. ive had my dorado for quite sometime and did a water change as normal close to the same temp water.. after water change i sat down and he started thrashin back and forth across the tank then straight up lifting my glass hoods a good 1/4 inch off the top of the tank.. did it like 5 times. then settled down..i know there fast but dam that was lightning in a bottle if ive ever seen it.