Helicoprion bessonovi

helicoprion the famous whorltooth shark. Up to 7,5 metres long, this eugenodontid barely made the list.  It still completely unknown how exactly this fish looked but it may have looked like here.  If it had proportions like here it was probably just as big as shown here but if it had proportions more like a chimaera fish it was probably longer.
Skin pattern based on this pic cdn.zmescience.com/wp-content/…