This bike came into my old shop from Oregon with a bunch of live roaches in it. A bunch of them fell out before we filled the frame with isopropanol and set it on fire, and started reproducing. It took almost three weeks until (we think) they all died off. Gross.
Those are hardy ball bearing eating roaches. They have lived their entire life in that bottom bracket from egg to adulthood eating bearings and drinking grease and rust water.