Assertion: sea urchin's food | /r/HasProperty | algae
Facets:
Source sentences:
text: However, their favorite food is algae.
text: The preferred food of green sea urchins is algal species of kelp such as Saccharina and Laminaria, and researchers and growers around the world working with other sea urchin species usually use kelp and other macro-algae as feed.