Everyone misses the rather obvious detail that giants have huge hunting ranges and must never be too numerous. At the same time, on death their chances of been fossilized are much greater as well simply because they are so slow to decompose.
Just as obvious, no one is out with the right tackle either. Thus we have a fluke capture scenario. At leasdt we now know these still exist.
As well it takes us back to the unexplored deep were huge creatures can hang out forever and never be discovered.
In another generation we will have the hardware for plenty of deep penetration to occur and we will be astonished by what is down there.
The giant sea creature had a total of 276 teeth in its jaws, spanning 5 rows with it’s biggest tooth measuring an incredible 15 cm