Assertion: sea slug | /r/HasProperty | treated as the order
Facets:
value: traditionally
type: OTHER
Source sentences:
text: Traditionally, nudibranchs have been treated as the order Nudibranchia, located in the gastropod mollusc subclass Opisthobranchia (the marine slugs: which consisted of nudibranchs, sidegill slugs, bubble snails, algae sap-sucking sea slugs, and sea hares).