wait a sec... How much do the Raphael catfish sound like crickets? I've been going crazy for the past few week thinking a cricket was in my room and cannot find it, but if the cricket sound is the raphael then either they can make other high pitch squeeks or someone else is chiming in too because I hear distinct squeeks as well. And the clicking almost sound like a stun gun just not as loud, but its fast tempo like stun gun. Also if the pictus, featherfin and raphael are the cuprits, are the sounds them fighting or having fun, during the day the featherfin and raphael share a log and are shy, while my pictus has ADHD all day, but at night they all share the log (even though there is tons of other real estate that is unused in the tank).