noun
ghost crab; sand crab; white crab
Refers specifically to Ocypode stimpsoni, a species of ghost crab found on sandy beaches in Japan. Often seen scurrying sideways into burrows.
夏の夜、砂浜でスナガニがたくさん見られる。
On summer nights, you can see many ghost crabs on the sandy beach.
スナガニは素早く砂の中に潜る。
Ghost crabs quickly burrow into the sand.
Compound of 砂 (すな, 'sand') and 蟹 (かに, 'crab'). The exact derivation is straightforward; the word literally means 'sand crab'.