M cGill (J nia ersitY, M o ntr e al (Receirsedfot ptfulication lune n, rcil) "ceraNus" snmss No.2 ABSTRACT 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-riine are rnarine {orms, two are anadromous, and thirteen'are predom.inantly or entirely freshwater forms. Seventeen are new records for Ungava Bay, and a few are new for the rvhole of the Canadian Eastern Arctic. The marine piscine fauna is shown to be in the nlain subarctic, containing such arcticsubarctic forms as Saloeli,nu,s alTtinus, Reinhardtius hippoglossoidbs, Ggmnocanthus tdcuspis, lcelus bi.cormis, Asuidophoroides olriki, Lumnemts fubricii, etc., and subarctic-boreal species such as Salmo salar, Gadus callarias, Sebastes marinus, Liparis atl.anticus and Mallot1ts aill.osus. More strictly arctic species in the fauna are Boreogadus srilda, Triglops ngbekni' and Oncocottns quadricomis; there are two Atlantic boreal species recorded, Paralepis rissoi kriigeri anld Larnpaqgctus crocod.ilus, and the remainder are fishes of r.r'ide north-south range, found in all three zones (aictic, subarctic, boreal), such as Sornniosus microcephalus hl.gctophum gl'aciale, Ammod.ytes d,ubius, T'ri,glops pir-tgeli, Eum.icrotremus spi,nosus, Liparis tunicatus, Lumpemn maculatus, Lu codes r etiatlatus.