Banjos, until adult or near adult size, are tempting tidbits because as long as your water quality is good*, unless they're actively feeding they don't effing move. Many times over the years my wife thought one of my banjos was dead because of lack of movement until she took a net after it(she has since ceased to attempt removing that species, lol). Plus, they have some dandy spines, so when they do get swallowed, you're liable to lose both fish.
*banjos are excellent water quality monitors, if you see one swimming endlessly in your tank, do an immediate water change, something is out of whack. Quite often something has died, causing a spike, especially in tanks 45 gallons and below.