I found with the parrot I had when it was young it was like your's. I feed it blood worms once or twice a week by hand and then every time I went to the tank it was up at the glass wanting food. Also if you get other fish remember that anything that will fit in its mouth will become food. You could try getting more cover from tall plants like a tiger lotus and give them a few caves to hid in which mite make them feel safer and then not so jumpy