Butterflyfish and Scorpaenoid fish

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

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

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

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