Its one of the few bichirs robust enough to survive a bunch of chichlids and not aggressive enough to kill them all. Sure he will sometimes catch a young one, but if You have enough rocks, caves or other hiding places, some of the small ones will have a chance to grow up.
Endlicheri congicus is found in lake tanjanika and lake malawi.
Also there are many types of catfish from those lakes.
greetings
Thomas