Xenodignathus - Tumblr Posts

xenodignathus, more commonly called a strange bijaw, is a small highly derived bijaw, being the only obligate herbivorous bijaws, they swim through the bodies of ammonia they inhabit close to the surface in search for anemedromeous, their fins are tiny used almost exclusively to help with steering themselves while they swim, unlike most bijaws they swim in a subcarangiform style as opposed to the spectrum of carangiform to thunniform swimming of every other mature bijaw, though the fry of most bijaw do swim on a spectrum of anguilliform to subcarangiform swimming, this alongside size and fossil evidence points towards neoteny playing a large part in their evolution, they only venture away from the surface if they sense a predator or if they just mated and need to find a safe space to lay their eggs, some species of xenodignathus lay their young in sacs similar to telluric chondrichthyes, if you have any questions about this ichthyongiu please dont be afraid to ask im more than happy to answer