Help stocking 20 gallon saltwater tank
I'm in an aquatic science class and this is my first time doing a saltwater tank. I don't really know anything about the tank what kind of filter we are using or anything like that because she hasn't told us. Well everything is set up and ready for fish according to her but not so sure since the tank has only been running since we got back after the hurrican 2-3 weeks ago. the school is pushing her to get fish in the tanks so she wants us to have fish by next week.
Whats a fish i can get thats easy to care for (since im a beginer), thats very hardy (since i'm not so sure about the tank)?