What does "plectognath fish" mean?

tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines

What is a synonym for "plectognath fish"?

Common synonyms include: plectognath.

Rare ·Advanced level

Noun

1
tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines wordnet