The following parasites are described from deep-sea fishes of the northeastern Atlantic Ocean. Fellodistomidae: Steringophorus haedrichi from Spectrunculus grandis, Porcupine Seabight; Olssonium turneri from Alepocephalus agassizi, Rockall Trough and Porcupine Seabight; Hypertrema ambovatum from Synaphobranchus kaupi, Rockall Trough and Porcupine Seabight and Histiobranchus bathybius, Porcupine Seabight; and Zoogonidae: Brachyenteron rissoanum from Polyacanthonotus challengeri, Porcupine Seabight. These are the first reports of S. haedrichi, H. ambovatum and B. rissoanum from the northeastern Atlantic Ocean.