Thanks ! I will keep them seperatedIt's not okay. 13 will try to swallow 7 and spit him back out ,and you'll have a Dead rtc.
When I bought my 11" short rtc along with his long time tank mate, a 7" paraya, the rtc swallowed the paraya then spit it back out dead in the bucket. I saw the marks on the paraya so he did do it.
You're right rtc will try to eat anything that fits in there mouth, thanks for the comment.Just understand this...
Any aggressive animal including fish, if it can fit in their mouth they will try to get them. Most animal their mouth can double the size when eating. It would be a big risk to put the 7" in there unless you kept the 13" well fed, but again every animal is unpredictable. No would be my answer.
Thanks for the comment I'm going to keep them seperated, instead of risking my 7" rtc getting swallowed.Like sticky Rice said animals are unpredictable. Some times you think your out of the woods fish can be together for days, months or even years but there's gonna be one day it will be in its stomach even if you feed well catfish are gluttons. I had a redtail eat it's tank mates that's it been in with for a while. There very unpredictable fish