The red tail tin foils that supposedly max at 8 inches don't. I had 5 that were 14" in about a year and a half. I think they gat as large as schwanenfeldii.
They were $1. They are my favorite schooling fish. Right now they are in a 150 and I could split them between my tanks and throw some in the 1500 once heated.
I've obviously got time to decide with hem since they are small.
They were from petsmart and they are growing rather slow.
Not sure if youre still thinking about the bichirs but i just gave mine away because i saw it biting the end of my rays tail..i wont be putting anymore of them in w/ my ray