Hi Dave and lucky.
You got it Dave, they are called dolphin fish in the US and are also known as mahi mahi.
We have tried a days trolling recently running a mixed spread of lures for tuna and marlin. We didn't see any dorado (or marlin), and I would have thought it a bit too early. We did see some isolated flying fish, which I consider very rare in these waters, so I'm rather hoping it's going to be a good big game season.
The dourado are great fun to catch on light tackle a bit later in the season. I have seen literally hundreds in the air chasing the lures, very spectacular. We don't get too many big ones, but plenty up to about 3 feet long, especially later in the year when they have put some weight on. I understand that they are the fastest growing fish of them all, and have a very short lifespan. I do know that they taste lovely, and will try and take a lure as big as they are.
The dourada (gilt head) tend to come and go according to the seasons, we haven't caught many. But the locals fish the estuary for thenm in the spring.
Smoking drags - Bob