A Fathead (genus Psychrolutes) trawled during the NORFANZ expedition at a depth between 1013 m and 1340 m, on the Norfolk Ridge, north-west of New Zealand, June 2003 (AMS I.42771-001). Photo: K. Parkinson © Australian Museum. The scientists and crew on board the RV Tangaroa affectionately called this fish 'Mr Blobby'. Note the parasitic copepod on Mr Blobby's mouth.
(Saw this on Ramblefish's blog and decided everyone needs to see it. :P)
A video of a Psychrolutes in action.