Spotted or Pajama Cardinal fish.

[Dorkel Marine 1]

I'm asking if anyone can lead me to a website with basic info on Marine corals and fish. I just purchased two spotted cardinals at J&L's. I know that they are ok for my system and water. I wanted to get some info on there feeding and care needs. Just a reminder. They will be the only fish along with two red-headed gobies and a coral banded shrimp in my 27 gallon tank. Thanx in advance George.