Assertion: krill | /r/HasProperty | vital
Facets:
value: for all animal life forms
type: OTHER
value: absolutely
type: DEGREE
value: for sea life
type: PURPOSE
Source sentences:
text: They feed on phytoplankton and, because they are the primary food staple for hundreds of fish, birds and whales, they are absolutely vital for sea life.
text: They are a vital food source for animals including whales, seals and penguins.
text: The Antarctic ecosystem is unique in that the food chains are very short and often based on the availability of krill, which is vital for all animal life forms living in Antarctica.