I have a very timid male that gets them. When I first got him he would get them when I did water changes or transferred him to another holding area. Then he would get them just from me coming around the tank. He even runs from his reflection if I hold a mirror up to him he goes and hides in his cave lol. He's a wimp but I love him lol. He's finally figured out I'm also the source of food so now he tolerates me.