Osteodiscus cascadiae

Osteodiscus cascadiae, the bigtail snailfish, is a marine fish in the family Liparidae. This species is known from the deep waters of the Northeast Pacific where it occurs at depths of. It grows to length from SL to SL. This species is one of three known members of its genus. The species name cascadiae refers to the Cascadia Abyssal Plain, a location off Oregon where the fish has been found. A 2025 journal on the discovery of Careproctus colliculi noted that the fish showed genetic similarities.