It would be AWESOME if we could tame this beast. We can scrape food off of it, it has more base health than a Mosasaurus and can break everything up to and including metal. I say it should have a platform saddle, it would be the perfect base since as I already mentioned WE CAN SCRAPE FOOD OFF OF IT! So if you are at sea and become low on food, scrape off the fish meat and have a feast. This would be perfect for pvp and in all honesty, great for singleplayer and pve as well. Surely I am not the only one who would want this?
Imagine this: leedsichthys tameable and rideable. They can harvest metal and oil. They had a platform saddle. They could swallow fish hole and carry them around alive. WELL THEY ARENT TAMABLE! They would be op as a tame.