The aquatic environment of the Ungava Bay area and watershed is described. Forty-four species of fishes are recorded, belonging to twenty-one families. Twenty-nine are marine forms, two are anadromous, and thirteen are predominantly or entirely freshwater forms. Seventeen are new records for Ungava Bay, and a few are new for the whole of the Canadian Eastern Arctic. The marine piscine fauna is shown to be in the main subarctic, containing such arctic-subarctic forms as Salvelinus alpinus, Reinhardtius hippoglossoidès, Gymnocanthus tricuspis, Icelus bicornis, Aspidophoroides olriki, Lumpenus fabricii, etc., and subarctic-boreal species such as Salmo solar, Gadus callarias, Sebastes marinus, Liparis atlanticus and Mallotus villosus. More strictly arctic species in the fauna are Boreogadus saida, Triglops nybelini and Oncocottus quadricornis; there are two Atlantic boreal species recorded, Faralepis rissoi kröyeri and Lampanyctus crocodilus, and the remainder are fishes of wide north-south range, found in all three zones (arctic, subarctic, boreal), such as Somniosus microcephalus, Myctophum glaciale, Ammodytes dubius, Triglops pingeli, Eumicrotremus spinosus, Liparis tunicatus, Lumpenus maculatus, Lycodes reticulatus.
Notes on the Didemnidae (Ascidiacea): I. The presence of Didemnum (Leptoclinides) faeröense (Bjerkan) in the Plymouth area
