Lepidurus arcticus

Lepidurus arcticus is a species of tadpole shrimp which inhabits both ephemeral pools and permanent freshwater lakes of Norway, Greenland, Finland, Sweden, Svalbard, Iceland, Russia and the Kuril Islands.

Unlike other species of tadpole shrimp, Lepidurus arcticus is known to coexist with fish, such as Arctic char. Furthermore, they exist in water temperatures much colder (4–7 °C or 39–45 °F) than the other species of its order. It is a common predator of Daphnia pulex.