Both genera of the family are represented in all three major oceans of the world. Females of Gigantactis have been reported from as far north as southern Greenland, with the southernmost record close to 50°S in the Atlantic sector of the Southern Ocean. The known distribution of Rhynchactis is restricted to tropical and subtropical regions between about 30°N and 10°S. The great majority of the recorded metamorphosed specimens of the family have been captured in nets fished in maximum depths exceeding 1000 m. Gigantactinids thus appear to be among the deepest-living ceratioids, with greatest abundance between 1000 and at least 2500 m.
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