Scorpionfish and Scorpaenid fish

Scorpionfish noun - Marine fishes having a tapering body with an armored head and venomous spines.

Scorpaenid fish and scorpionfish are semantically related. In some cases you can use "Scorpaenid fish" instead a noun "Scorpionfish".

Scorpaenid fish noun - Any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific.

Scorpionfish and scorpaenid fish are semantically related. Sometimes you can replace term "Scorpionfish" with "Scorpaenid fish", this terms are similar.