[2] D. pulicaria are filter-feeders with a diet primarily consisting of algae, including Ankistrodesmus falcatus, and they can be found in deep lakes located in temperate climates.

[3] Furthermore, D. pulicaria are ecologically important herbivorous zooplankton, which help control algal populations and are a source of food for some fish.

[5] In recent years, D. pulicaria along with other Daphnia species have been negatively affected by invasive predators, such as Bythotrephes longimanus.

[8] The populations of D. pulicaria in the Great Lakes in the United States have been negatively affected by the invasive species Bythotrephes longimanus.

[9] Typically, Daphnia undergo asexual reproduction when living in favorable conditions, such as in environments with abundant food or with negligible crowding.

[11] The carapace, composed primarily of chitin, helps protect the feeding apparatus, and it is periodically shed during an individual's life.

[13] Species of Daphnia, including D. pulicaria, are commonly used as model organisms for studying life-history traits and phenotypic plasticity.