Jersey suffered their third defeat in a row as hosts Rotherham moved up to second in the Championship table with a deserved victory.
Tom Cruse, Charlie Mulchrone and Michael Keating tries put Rotherham 19-16 up at the break, with Ben Maidment crossing for the visitors.
The second half was a much tighter affair, with the only scores coming via Juan Pablo Socini's boot.
Jersey failed to add to their score and ended up without a losing bonus point.
Jersey: Aaron Penberthy; Mark McCrea, Grant Pointer, Drew Locke, Ed Dawson; Niall O'Connor, Nicky Griffiths; Sean McCarthy, Dave Felton, David Young, Nick Campbell, Alex Rae (capt), Ben Maidment, Joe Buckle, Tom Brown.
Replacements: Tom Fidler, Luke Stratford, Nick Selway, Dave Markham, James Voss, Jimmy Williams, Mark Foster
Rotherham: Sean Scanlon; Jamie Broadley, Jack Roberts, Juan Pablo Socino, Michael Keating; Dallan Murphy, Charlie Mulchrone (cap.); Marshall Gadd, Tom Cruse, Colin Quigley, Ben Thomas, Dan Sanderson, Alex Rieder, Ali Birch, Ed Williamson.
Replacements: Jack Preece, Mike Dias, Mark Tampin, Barney Maddison, Alfie To'oala, Dan White, Joel Gill