Hapalogaster is a genus of king crabs, containing the following four species:[1]
| Image | Scientific name | Common name | Distribution | |
|---|---|---|---|---|
| Hapalogaster cavicauda | West Coast of the United States | |||
| Hapalogaster dentata | Stone crab, spiny stone crab | Yellow Sea, Sea of Japan, coast of Mainland Japan | ||
| Hapalogaster grebnitzkii | ||||
| Hapalogaster mertensii |