Cestum veneris vs comb jelly

Cestum veneris and comb jelly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cestum veneris	Yes	No	No	No
comb jelly	Yes	No	No	No

As nouns, comb jelly is a hypernym of Cestum veneris; that is, comb jelly is a word with a broader meaning than Cestum veneris:

Cestum veneris: ctenophore having a ribbon-shaped iridescent gelatinous body
comb jelly: biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb

Other hypernyms of Cestum veneris include ctenophore.

Cestum veneris (noun)	comb jelly (noun)
ctenophore having a ribbon-shaped iridescent gelatinous body	biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb