I can't tell whether my psittacus are developing HITH/HLLE or if it's just normal sensory pits on their heads. All the other photos I find of psittacus have similar holes/pores. They're fed high quality pellets and I do weekly water changes of 75%. No other fish have signs of HITH/HLLE. These guys have started growing rapidly. They did go on a 2 month hunger strike where they would only eat zucchini back when I first got them, but since mid September they've been eating pellets well. All the holes/pores are symmetrical on both fish.