I've got a shoal of 8 Harlequin Rasbora w/ a ratio of either 3/5 male:female or 4/4 male:female. I have noticed a lot of jousting among these fish and they will even chase members of the neon tetra shoal around. I got 8 because I thought the number would keep these guys chilled out. The HRs don't pay too much attention to the corydoras or Betta splendens however Paracheirodon innesi
is a free target.
I know these are not cyprinids but even my Paracheirodon innesi /neon tetras, are a little territorial with-in their own species; something I find odd, because certain members of this shoal, do not like each other...... Tank 2 Big - 15 gallon Freshwater fish tank
Thank you for any advice. A link to the tank and specs is above. My Betta Splendens is like the most peaceful fish in the whole tank. Go figure?!