Generality
Krill oil is a dietary food, used exclusively as a food supplement.
What is krill?
Krill (a term of Northern European origins) is a set of various invertebrate animal species (mainly crustaceans), included in the order Euphausiacea.
It is basically zooplankton, which by associating with phytoplankton, other microorganisms (unicellular algae, protozoa, etc.), larvae, and complex organisms such as jellyfish or multicellular algae, forms plankton.
Plankton (therefore also krill) is a food source necessary for the survival of numerous marine species such as: cetaceans, sharks, whales, blue fish and water birds.
The marine food chain starts from phytoplankton (which is perpetuated using the nutrients dissolved in water, gases and sunlight), in turn eaten by zooplankton, which also includes krill.
Krill represents the second step in the marine food chain.
