cichlid fish vs bolti

cichlid fish and bolti both are nouns.

Word	Noun	Adjective	Verb	Adverb
cichlid fish	Yes	No	No	No
bolti	Yes	No	No	No

As nouns, bolti is a hyponym of cichlid fish; that is, bolti is a word with a more specific, narrower meaning than cichlid fish:

cichlid fish: freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums
bolti: important food fish of the Nile and other rivers of Africa and Asia Minor

Other hyponyms of cichlid fish include Tilapia nilotica.

cichlid fish (noun)	bolti (noun)
freshwater fishes of tropical America and Africa and Asia similar to American sunfishes; some are food fishes; many small ones are popular in aquariums	important food fish of the Nile and other rivers of Africa and Asia Minor