''Crystallias'' is a

monospecific genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ...

of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Liparidae The snailfishes or sea snails (not to be confused with invertebrate sea snails), are a family of marine ray-finned fishes. These fishes make up the Liparidae, a family classified within the order Scorpaeniformes. Widely distributed from the ...

. It only species ''Crystallias matsushimae'' is found in the northwestern

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

. It is found at depths of from . This species can grows up to a length of TL.Tohkairin, A., Kai, Y., Ueda, Y., Hamatsu, T., Ito, M. & Nakabo, T. (2014): Morphological divergence between two color morphotypes of ''Crystallichthys matsushimae'' (Cottoidei: Liparidae). ''Ichthyological Research, 62 (2): 145-155.''

References

Liparidae Fish described in 1902 Taxa named by David Starr Jordan Taxa named by John Otterbein Snyder {{Liparidae-stub