Sawfish
https://www.msn.com/en-us/science/ecology/historical-dna-reveals-largetooth-sawfish-have-lost-much-of-their-genetic-diversity/ar-AA29QP6e
This blog is about genetics in the widest sense from humans to animals as well as diseases and other genetic related material. I require the assistance of the visitor. I would be grateful if you could offer feedback as well as give links. My details are ahai11london@yahoo.co.uk