Hi Faith, thank you for
taking the time to build this very informative site. I just
found my fry (5 weeks) catching and devouring one of its siblings.
I like to avoid jarring them all because of the large number of
containers needed, is there another better way to separate them and
prevent this from happening again. Thank you
Brian, maybe you should feed your fry every now and then LOL.... But
seriously, it is highly unusual for 5 weeks old fry to eat each
other. Usually cannibalism will happen when some fry become severely
larger than others (2 to 2 times the size). At which point the
larger fry may snack on their little brothers/sisters
There should be no reasons for you to have to jar all your 5 week old fry. Although you did not mention a size difference, I am going to guess and say that the betta who ended up a snack was much much smaller. Otherwise how could it have been "caught"? "Catching" as you said implies (to me) that the predator was able to bite and hold its prey with its jaws, signifying a large size discrepancy.
To avoid having larger fry snack on the runts, you can do two things:
Hope this helped you :).