Remilegia australis vs remora

Remilegia australis and remora both are nouns.

Word	Noun	Adjective	Verb	Adverb
Remilegia australis	Yes	No	No	No
remora	Yes	No	No	No

As nouns, remora is a hypernym of Remilegia australis; that is, remora is a word with a broader meaning than Remilegia australis:

Remilegia australis: large blue Pacific remora that attaches to whales and dolphins
remora: marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects

Other hypernyms of Remilegia australis include suckerfish, sucking fish.

Remilegia australis (noun)	remora (noun)
large blue Pacific remora that attaches to whales and dolphins	marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects