''Osteodiscus cascadiae'', the bigtail snailfish, is a marine fish in the family

Liparidae The Liparidae, commonly known as snailfish or sea snails, are a family of marine scorpaeniform fishes. Widely distributed from the Arctic to Antarctic Oceans, including the oceans in between, the snailfish family contains more than 30 genera ...

(snailfishes or seasnails). This species is known from the deep waters of the Northeast Pacific ( British Columbia, Canada to at least Oregon, United States) where it occurs at depths of . It grows to length from SL (male/unsexed) to SL (female). 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.

References

cascadiae Fish described in 1978 {{Scorpaeniformes-stub