: Daphnia cucullata.

Daphnia cucullata is characterised by a head with no eyespot, which forms an extraordinarily strongly protruding part that ends up in a sharp, somewhat dorsally curved point. It most commonly occurs in nutrient rich lakes with high densities of fish.

Daphnia cucullata Sars
Creative Commons Attribution | Bjørn Walseng | Norsk institutt for naturforskning
Kart. Utbredelse i Norge.