spur
In fishes, normally refers to a a stiff sharp spine or bony outgrowth.
Ichthyological terms, not general ones.
In fishes, normally refers to a a stiff sharp spine or bony outgrowth.
Accessory or spurious gill, often located on the inner surface of the operculum in various fishes, that is usually small and sometimes completely obscured beneath the epithelium. Also referred to as pseudobranchia.