As nouns the difference between blennioid and blenniid
is that blennioid is any member of the "true blennies" of the suborder blennioidei while blenniid is (zoology) any member of the family blenniidae; a combtooth blenny.
blenniid
English
Noun
(
en noun)
(zoology) Any member of the family Blenniidae; a combtooth blenny.