The other one looks like a baby mangrove snapper.
I wouldn't have put those fish in your tank....
Reasons,
1) You don't know what they are.
2) They will most likely get too big for your tank.
3) The snapper will eat some of your current inhabitants as it grows.
4) Your tank has stuff from all over the world so now you can't just release them if you don't want them.
5) Now you need to find them a good home.
It would different if you were collecting little gobies and blennies (there are some cool clingfish and blennies that are easy to spawn and raise down there), but jacks and snappers get big.