As nouns the difference between blennioid and triplefin
is that blennioid is any member of the "true blennies" of the suborder Blennioidei while triplefin is any of approximately 150 blennioid species of the family Tripterygiidae, found in tropical and temperate waters, whose dorsal fin is separated into three parts, two of them spinous.
triplefin
Noun
(
en noun)
Any of approximately 150 blennioid species of the family Tripterygiidae, found in tropical and temperate waters, whose dorsal fin is separated into three parts, two of them spinous.
Synonyms
* threefin