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.
Plankton are also divided into 3 main types: 1  Phytoplankton (from Greek phyton or plant), algae that live near the water surface where there is sufficient light to support photosynthesis. 2  Zooplankton (from Greek zoon or animal), small protozoa, crustaceans, jellyfish and various other animals that feed on other plankton.n Plankton, Sea Life. plankton facts-facts about plankton-what is plankton-. Plankton is not the name of a plant or animal but more of a category for any drifting organism that inhabits the middle to upper levels of the ocean, namely the pelagic zone.
Species of Zooplankton. There are thought to be over 30,000 species of zooplankton. Zooplankton can live in fresh or salt water, but this article focuses largely on marine zooplankton. Types of Zooplankton. Zooplankton may be classified according to their size or by the length of time they are planktonic (largely immobile). Some terms that are used to refer to plankton include: Microplankton - organisms that are 2-20 Âµm in size - this includes some copepods and other zooplankton.