Estuarine Sand-shrimp (Gammarus duebeni)
The adult is olive-brown with a laterally flattened body with a curved dorsal outline. It has black kidney-shaped eyes, dorsal clusters of spines on the last 3 segments of its body, and 2 pairs of long antennae. When out of water it jerks along on its side. Length 16 to 22mm.
It feeds on dead plant and animal material, and hunts small invertebrates.
Found in brackish water and shores with freshwater run-off, estuaries, rocky shore pools, even lakes and rivers. It can tolarate low salinity. Locally common.
Photograph of Estuarine Sand-shrimp (Gammarus duebeni) taken April 2013, West Shore, Llandudno, Wales. © Pete Hillman 2013. Camera used Nikon Coolpix P500.
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