Antarctic minke whales are predators of krill, mainly Euphasia superba and are preyed on by killer whales (Orcinus orca). They may compete with other mammals and birds feeding on krill, such as penguins (Spheniscidae), crabeater seals (Lobodon carcinophaga), and blue whales (Balaenoptera musculus). Antarctic minke whales may also be the host of several types of microorganisms. For instance, they are often observed to have a film of diatoms on their skin. The extent of this film is thought to be correlated with the amount of time a whale has spent in cold waters.
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