lookdown fish vs Selene vomer

lookdown fish and Selene vomer both are nouns.

Word	Noun	Adjective	Verb	Adverb
lookdown fish	Yes	No	No	No
Selene vomer	Yes	No	No	No

As nouns, lookdown fish and Selene vomer are synonyms defined as:

lookdown fish and Selene vomer: similar to moonfish but with eyes high on the truncated forehead

Other synonyms of lookdown fish include lookdown.

lookdown fish (noun)	Selene vomer (noun)
similar to moonfish but with eyes high on the truncated forehead	similar to moonfish but with eyes high on the truncated forehead