Essential oils are natural, chemical-free alternatives to store-bought bug sprays. Many essential oils are mosquito repellents. Lemongrass and Citronella are the most commonly used in natural bug sprays, but most lemon-scented essential oils are insecticides. Other good options include Eucalyptus and Lavender.
1 Phytoplankton: photosynthetic plankton that are usually microscopic and are also called âalgae... 2  more. 3  Zooplankton: small, sometimes microscopic animals that live in water and feed on phytoplankton (algae), other zooplankton, or detritus (dead material)...4  more.here are bacteria that decompose, or break down, dead organisms and animal waste in the water. There are also photosynthetic bacteria that use the sunâs energy to turn carbon dioxide into sugars. These are called cyanobacteria, and theyâre a type of phytoplankton. Other kinds of phytoplankton, though, are eukaryotes.
There are 5 classes: Branchiopoda (fairy shrimp, water fleas) Cephalocarida (small crustaceans) Malacostraca (isopods, amphipods, krill, crabs, shrimp, lobsters) Maxillopoda (copepods, barnacles) Remipedia (small, recently discovered crustaceans) Subphylum Uniramia This is the largest of the subphyla.rabs and Amphipods. Phylum Arthropoda This is the largest and most successful of the animal phyla, with over 1 000 000 species identified to date and an estimated 1 000 000 000 000 000 000 (1 quintillion) individuals alive today.