So I have a Datinoid that is 2 1/2" maybe 3" long. Really nice looking fish but it seems to have gotten more and more skittish over the 2 weeks that I have had it. It hides most of the time and I am concerned because I never see it eat any of the food that I am putting in. I checked my water levels and they are all in check. Is it normal for this fish to be so shy and will it "outgrow" this behavior as it grows? Do they prefer a certain food?(I am feeding a frozen mix that I bought from the pet store.) Thanks for any info you may have.