also: ちごがに
noun
Ilyoplax pusilla (crab species)
A small crab species found in tidal flats; the name is usually written in kana.
干潟でチゴガニを観察した。
I observed Ilyoplax pusilla crabs on the tidal flat.
The name チゴガニ (稚児蟹) literally means 'child crab', likely referring to its small size. The exact derivation is uncertain.