Not for a year to 16 months, depending on diet. I bought my ornates on Halloween of this year at 4.5-5" and they are now at the 7-8" mark. They grow very quickly--as much as 2" per month until they hit 10". I would say you ought to migrate them at about that point, but could wait a bit longer. They are very shy as far as polypterids go. One of mine is thoroughly convinced I am going to eat her. The slightly larger male is less skittish, bit still prefers that I keep my distance. I have seen it mentioned that this clears up a bit as they approach adulthood. Throw a delhezi in the mix! They look great, and will constantly be swimming. I have 4 in a grow out tank with an endli right now and can't wait to add them to the 180 poly community.