Gammarus pulex
Animal
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Gammarus pulex is a species of amphipod crustacean found in fresh water across much of Europe. It is a greyish animal, growing to 21 mm long. Wikipedia
Scientific name: Gammarus pulex
Higher classification: Gammarus
Class: Malacostraca
Order: Amphipoda
Phylum: Arthropoda
Domain: Eukaryota