"These strange creatures are saucer shaped and pure white in colour. The mouth is at the centre of the upper surface; on either side of the mouth is a 4" long eyestalk. The underside carries a mass of small spikes and numerous small tentacles. The flumph 'flies' by sucking air into its mouth and expelling it through its underside. Normally it floats about 4" above the ground but can fly up to 10', particularly for attack purposes."
Don Turnbull ed., Fiend Folio