What is krill oil made from?

Krill.

Krill are a type of ocean crustacean that very closely resemble shrimp but are smaller in size. Krill can grow up to five centimeters in length and due to their miniscule size, krill are a food source for fish, whales, squid, penguins and seals. Like fish oil found in fish, krill oil is extracted from krill because of its rich supply of Omega 3 fatty acids.