We need to start the hitchhiker ID sticky with all the pics of bad boys. Don't even think RC has that.
Like a most wanted list. ALMOST all menacing looking things in our tanks are bad or will be bad, once too large. I quickly pull it out then take the pic.
Learned that one the hard way. I had an acro eating crab in my system for weeks and I couldn't find the buggard cause I was busy snapping a thread pic. I couldn't pull him out so I thought I stabbed him to death and it was just chilling in a bored out tunnel in the rock.