Angler fish and Spiny-finned fish

Angler fish noun - Fishes having large mouths with a wormlike filament attached for luring prey.

Spiny-finned fish and angler fish are semantically related. In some cases you can use "Spiny-finned fish" instead a noun phrase "Angler fish".

Spiny-finned fish noun - A teleost fish with fins that are supported by sharp inflexible rays.

Angler fish and spiny-finned fish are semantically related. Sometimes you can replace phrase "Angler fish" with "Spiny-finned fish", this phrases are similar.