This thing has no equal on speed in the water, just be very careful after investing points into it since the lag can cause some things to appear right when you are on top of them. Also they are very squishy so a pack of jelly fish will usually spell the end for it if you get caught.
How to exploit it: creatures (in mobile version) can’t see you on its back and you will not attack you. You can shoot arrows at megaladons and live. Easy as that. New best way to game a megaladon is the Ichthyosaurus. (Trust me I tried and it worked!)
Very fast mount, can carry decent weight and does a lot of damage. If you lure large carnavores/herbivores into the water so long as they haven’t targeted you the will not attack your ichthy and can’t really go anywhere. Have killed thezinos with a single ichthy.
These things are very good tames and are good for getting oil and underwater scouting since thy are fast and can even successfully take on a meg. I highly recommend these creatures as soon as u can unlock its saddle✌️