skillet fish vs clingfish

skillet fish and clingfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
skillet fish	Yes	No	No	No
clingfish	Yes	No	No	No

As nouns, clingfish is a hypernym of skillet fish; that is, clingfish is a word with a broader meaning than skillet fish:

skillet fish: clingfish with typical skillet shape
clingfish: very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.

skillet fish (noun)	clingfish (noun)
clingfish with typical skillet shape	very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.