Presence of phytoplankton is low in August with exceptional blue green algae, green algae, and golden algae. Occurrence of zooplankton is more varied with several species of rotifers, cladocerans, and copepods. Among the aquatic plants in the lake fennel pondweed is notable as it normally only occurs in sea bays. Other aquatic plants and nymphoides include rigid hornwort, broad-leaved pondweed, perfoliate pondweed, water-starwort, "Nymphaea alba", "Lemna", and "Chara tomentosa" (for which the lake is, together with Kyrksjön, the only locale in Stockholm).