I have two blue fish which are tropical and have these weird two "whiskers" coming from the bottom of a little behind their heads. One of them might be pregnant! Because it stayed in the cave thingy I have for them and it rarely came out. It just stayed in there. Previously I learned that one of the fish has black stripes which came a few days ago and that that could be a sign of maturing or mating. So you can see why one of the fish might be pregnant. However, the pregant fish came out for a few minutes to eat and the larger one (the male maybe) kept acting so different. He kept trying to push it and bite it at its tail. He got her so frightened she hid from him behind the filter. He keeps staying behind her and coming toward her but not doing anything as though he is forcing her or acting like some forceful male. Why is he doing this?