What size do red head tapajos breed at? I 2 that are 3.5" and 1 that is 3". I noticed today that one of them with more red on it's head being a little mean to the 3" but will swim right next to the other 3.5" one with out any problem but the largest one with no red on it's head is being a little territorial over a spot behind my driftwood but the one 3.5" one can go in there sometimes. Could they be getting ready to breed? The smaller one has now dark vertical stripes on it's sides, what could this be from?