noun
a type of fish characterized by spiny fins
adjective
relating to or characteristic of the acanthopterygians
-
The acanthopterygian fish is characterized by its spiny fins.
-
I saw a cool acanthopterygian fish at the aquarium today.
-
Check out that funky acanthopterygian swimming around!
-
Her sharp wit was like that of an acanthopterygian fish, cutting through the conversation with precision.