Allmouth and Spiny-finned fish

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

Spiny-finned fish and allmouth are semantically related. In some cases you can use "Spiny-finned fish" instead a noun "Allmouth".

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

Allmouth and spiny-finned fish are semantically related. Sometimes you can replace term "Allmouth" with "Spiny-finned fish", this terms are similar.