Euphausiacea vs animal order

Euphausiacea and animal order both are nouns.

Word	Noun	Adjective	Verb	Adverb
Euphausiacea	Yes	No	No	No
animal order	Yes	No	No	No

As nouns, animal order is a hypernym of Euphausiacea; that is, animal order is a word with a broader meaning than Euphausiacea:

Euphausiacea: small commonly luminescent crustaceans; important element of marine plankton: krill
animal order: the order of animals

Euphausiacea (noun)	animal order (noun)
small commonly luminescent crustaceans; important element of marine plankton: krill	the order of animals