Gigantidas is a genus of large, deepwater, hydrothermal vent mussels, marine bivalve molluscs in the family Mytilidae.
Species in this genus are found on deep-sea hydrothermal vents on the southern Kermadec Ridge. These mussels form dense beds at these sites.
The shells of Gigantidas gladius are up to 30 cm long.
Species within the genus Gigantidas include:
Gigantidas is a genus of large, deepwater, hydrothermal vent mussels, marine bivalve molluscs in the family Mytilidae.