For those who have never kept Dorado they should just keep quite.... Dorado will pick a fight with just about any fish. And have an aggressive attitude when it comes to feeding, so when fights take place there will be plenty of missing scales, torn fins, and possibly a dead fish in the mix. I've had dorado rip a fish apart twice its size. For those who don't own these fish and are criticizing elindra for neglect of his fish are wrong and need to do a little more research on fish behavior... and these fish can go a week or two EASILY without feeding. In the wild they don't always find food.
In my overall opinion dorado shouldn't be kept in tanks that aren't over 500+ gallons. These fish are river fish and demand a lot of run to swim and hunt. And grow extremely large as well. They are a sport fish for a reason.