Gigantidas

Gigantidas is a genus of large, deepwater, hydrothermal vent mussels, marine bivalve molluscs in the family Mytilidae.

Distribution and habitat
Species in this genus are found on deep-sea hydrothermal vents on the southern Kermadec Ridge. These mussels form dense beds at these sites.

Description
The shells of Gigantidas gladius are up to 30 cm long.

Species
Species within the genus Gigantidas include:
 * Gigantidas coseli Saether, Little, Campbell, Marshall, Collins & Alfaro, 2010
 * Gigantidas gladius Cosel & Marshall, 2003
 * Gigantidas horikoshi Hashimoto & Yamane, 2005
 * Gigantidas samario Cosel & Gracia, 2018
 * Gigantidas taiwanensis (Cosel, 2008)
 * Gigantidas tangaroa (Cosel & B. A. Marshall, 2003)