Sea scorpion and Scorpaenid fish

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

Scorpaenid fish and sea scorpion are semantically related. In some cases you can use "Scorpaenid fish" instead a noun phrase "Sea scorpion".

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

Sea scorpion and scorpaenid fish are semantically related. Sometimes you can replace phrase "Sea scorpion" with "Scorpaenid fish", this phrases are similar.