Jassa is a genus of amphipods in the family Ischyroceridae, comprising the following species:
- Jassa algensis <small>(Nardo, 1847)</small>
- Jassa alonsoae <small>Conlan, 1990</small>
- Jassa australis <small>(Haswell, 1879)</small>
- Jassa barnardi <small>Stephensen, 1949</small>
- Jassa borowskyae <small>conlan, 1990</small>
- Jassa cadetta <small>Krapp, Rampin & Libertini, 2008</small>
- Jassa calcaratus <small>(Rathke, 1843)</small>
- Jassa californicus <small>(Boeck, 1871)</small>
- Jassa carltoni <small>Conlan, 1990</small>
- Jassa falcata <small>(Montagu, 1808)</small>
- Jassa fenwicki <small>Conlan, 1990</small>
- Jassa goniamera <small>Walker, 1903</small>
- Jassa gruneri <small>Conlan, 1990</small>
- Jassa hartmannae <small>Conlan, 1990</small>
- Jassa herdmani <small>(Walker, 1893)</small>
- Jassa ingens <small>(Pfeffer, 1888)</small>
- Jassa justi <small>Conlan, 1990</small>
- Jassa kjetilanna <small>Vader & Krapp, 2005</small>
- Jassa marmorata <small>Holmes, 1905</small>
- Jassa marmorea
- Jassa monodon <small>(Heller, 1867)</small>
- Jassa morinoi <small>Conlan, 1990</small>
- Jassa multidentata <small>Schellenberg, 1931</small>
- Jassa myersi <small>Conlan, 1990</small>
- Jassa ocia <small>(Bate, 1862)</small>
- Jassa oclairi <small>Conlan, 1990</small>
- Jassa orientalis <small>(Dana, 1852)</small>
- Jassa pusilla <small>(Sars, 1894)</small>
- Jassa shawi <small>Conlan, 1990</small>
- Jassa slatteryi <small>Conlan, 1990</small>
- Jassa spinipes <small>(Johnston, 1829)</small>
- Jassa staudei <small>Conlan, 1990</small>
- Jassa thurstoni <small>Conlan, 1990</small>
- Jassa validum <small>(Dana, 1853)</small>
- Jassa variegatus <small>Leach, 1814</small>
- Jassa wandeli <small>Chevreux, 1906</small>