Krill are filter feeders and they mostly feed on diatoms which are considered as phytoplankton. Diatoms are algae that consist of only one cell. Other species of Krill feed on smaller amounts of zooplankton, which are tiny organisms found in sea water.
Krill are tiny aquatic crustaceans inhabiting oceans worldwide, sometimes in great numbers. The Antarctic krill has been estimated at over 500 million metric tonnes' biomass, perhaps the greatest of any multicellular organism. While a few species are...
Krill are fed on by whales such as Sei whales, manta rays, whale sharks and seals. A few bird species such as penguins, squid, and fish also eat krill especially when they concentrate into large groups.
Krill mainly eats planktons but they also feed on copepods, amphipods and other small zooplankton. Its digestive efficiency is not very high and thus releases a lot of carbon in the faeces. Krill have also been observed to eat each other in aquaria.
Krill are tiny aquatic crustaceans that live in the ocean. They eat phytoplankton and zooplankton. Krill are mostly transparent and sometimes you can see the chlorophyll from the phytoplankton on the outside.
Krill eat small creatures called Zooplankton. Zooplankton are mostly super small and although some can swim, most just drift in the water. You can find more information here: http://en.wikipedia.org/wiki/Zooplankton