i dont think it fully went extinct its just pronounced extinct cause we dont see them as much as we used to

The size for an average modern day frilled shark is really far off in this image, there was, however, a large now-extinct species called Chlamydoselachus goliath, which probably grew to around 6 meters (19.68 ft)!
It would be a really cool shark in game, but maybe just a skin idea for the blue shark or something? Awesome drawing by the way, I like how you included the six gills on this frilled shark. Maybe place the pelvic fins in front of the anal fins next time though.

Ih they better add this ''prehistoric shark'' 1000m depth

D'aw. It's adorable.

bootiful