Carassius vulgaris vs crucian carp

Carassius vulgaris and crucian carp both are nouns.

Word	Noun	Adjective	Verb	Adverb
Carassius vulgaris	Yes	No	No	No
crucian carp	Yes	No	No	No

As nouns, Carassius vulgaris and crucian carp are synonyms defined as:

Carassius vulgaris and crucian carp: European carp closely resembling wild goldfish

Other synonyms of Carassius vulgaris include Carassius carassius.

Carassius vulgaris (noun)	crucian carp (noun)
European carp closely resembling wild goldfish	European carp closely resembling wild goldfish