Cryptolithodes expansus

{{Short description|Species of king crab}}

{{Speciesbox

| image = Cryptolithodes expansus outline illustration.png

| image_caption = Outline of C. expansus by Rathbun

| genus = Cryptolithodes

| species = expansus

| authority = Miers, 1879{{Cite journal|last=Miers|first=Edward J.|url=https://archive.org/stream/proceedingsofgen79zool#page/46/mode/2up|journal=Proceedings of the Scientific Meetings of the Zoological Society of London|date=1897-01-14|publisher=Messrs, Longmans, Green, Reader, and Dyer|pages=47–48|title=On a Collection of Crustacea made by Capt. H. C. St. John, R.N., in the Corean and Japanese Seas.|author-link=Edward J. Miers}}

}}

Cryptolithodes expansus (Japanese: {{lang|ja|メンコガニ}}){{cite journal|last1=Ohtsuchi|first1=Naoya|last2=Kanki|first2=Takayuku|last3=Kawamura|first3=Tomohiko|title=メンコガニ（甲殻亜門，十脚目，異尾下目，タラバガニ科）の分布域の再検討と 大槌湾から得られた脱皮直後の個体の記録|trans-title=Review on the distribution ranges of Cryptolithodes expansus (Miers, 1879) (Crustacea: Decapoda: Anomura: Lithodidae) with notes on a specimen shortly after moulting found at Otsuchi Bay, Northeastern Japan|journal=Bulletin of the Otsuchi Coastal Research Center|date=26 April 2024|volume=39|pages=1–8|url=https://repository.dl.itc.u-tokyo.ac.jp/record/2009917/files/39_1.pdf|doi=10.15083/0002009917|doi-access=free|via=the University of Tokyo|access-date=30 November 2024}} is a species of king crab native to the Korean coast and Japan. They live in the sublittoral zone to a depth of approximately {{Convert|5–66|m|ft}}.{{Cite journal|last1=Kim|first1=Mi Hyang|last2=Hong|first2=Sung Yun|date=2000|title=Larval development of Cryptolithodes expansus Miers (Decapoda: Anomura: Lithodidae) reared in the laboratory|url=https://www.researchgate.net/publication/293151941|journal=Proceedings of the Biological Society of Washington|volume=113|issue=1|pages=54–65|via=ResearchGate}} Adults measure approximately {{Convert|50|mm|in|abbr=on}} wide and {{Convert|80|mm|in|abbr=on}} long and have a rostrum of about {{Convert|10|mm|in|abbr=on}}.{{Cite journal |last=Rathbun |first=Mary J. |author-link=Mary J. Rathbun |date=1902 |title=Japanese Stalk-Eyed Crustaceans |url=https://repository.si.edu/bitstream/handle/10088/13654/1/USNMP-26_1307_1902.pdf |url-status=live |journal=Proceedings of the United States National Museum |volume=XXVI |issue=1307 |pages=32–33 |archive-url=https://web.archive.org/web/20221028172910/https://repository.si.edu/bitstream/handle/10088/13654/1/USNMP-26_1307_1902.pdf |archive-date=28 October 2022 |via=the Smithsonian Institution}}