Mola and Plectognath fish

Mola noun - Among the largest bony fish; pelagic fish having an oval compressed body with high dorsal and anal fins and caudal fin reduced to a rudder-like lobe; worldwide in warm waters.

Plectognath fish and mola are semantically related. In some cases you can use "Plectognath fish" instead a noun "Mola".

Plectognath fish noun - Tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines.

Mola and plectognath fish are semantically related. Sometimes you can replace term "Mola" with "Plectognath fish", this terms are similar.