Niskaperäisiin
Niskaperäisiin is a Finnish term that translates to "nape-tailed" or "neck-tailed." It refers to a specific type of caudal fin structure found in some fish species, particularly within the order Anguilliformes, which comprises true eels. In these fish, the dorsal, caudal, and anal fins are fused together, forming a continuous fringe that runs along the posterior part of the body. This anatomical feature gives the tail a distinctive, elongated appearance, where the fin appears to originate from the nape or neck region of the fish.
The fused fin structure in niskaperäisiin fish serves several important functions. It contributes significantly to their
While the term "niskaperäisiin" specifically describes this fused fin condition, it's important to note that not