Assertion: sponge | /r/HasAspect | special symbiotic relationship
Facets:
value: with blue-green algae
type: OTHER
Source sentences:
text: Some sponges (particularly those growing on coral reefs) also have a special symbiotic relationship with blue-green algae, which provide the sponge with extra nutrients they make from sunlight to supplement the food that the sponge filters for itself.