I think that's pretty cool, i wonder about the barbels.
A few days ago i was throwing MS into the tank and a piece didn't go in the water but stayed on the glass ledge. small red ants which bite and hurt hadf started to eat the shrimp. A lot had fallen in the water by the time i knew what was happening. My fish had started to eat them, obviously i thought about them biting inside it's mouth. It didn't seem too bothered but its barbels were going crazy, kind of twitching up and down a lot. I've never seen it do that before. they're obviously a sensory tool.