Gammaridae
| Gammaridae | |
|---|---|
| Gammarus roeselii | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Arthropoda | 
| Class: | Malacostraca | 
| Order: | Amphipoda | 
| Suborder: | Senticaudata | 
| Infraorder: | Gammarida | 
| Parvorder: | Gammaridira | 
| Superfamily: | Gammaroidea | 
| Family: | Gammaridae Leach, 1813  | 
| Genera | |
| 
 Numerous, see text  | |
Gammaridae is a family of amphipods. In North America they are included among the folk taxonomic category of "scuds", and otherwise gammarids is usually used as a common name.
They have a wide distribution, centered on Eurasia, and are euryhaline as a lineage, inhabiting fresh to marine waters.