Butterflyfish and Scorpaenoid

Butterflyfish noun - Tropical fish with huge fanlike pectoral fins for underwater gliding; unrelated to searobins.

Scorpaenoid and butterflyfish are semantically related. In some cases you can use "Scorpaenoid" instead a noun "Butterflyfish".

Scorpaenoid noun - Fishes having the head armored with bony plates.

Butterflyfish and scorpaenoid are semantically related. Sometimes you can replace term "Butterflyfish" with "Scorpaenoid", this nouns are similar.