Wanna tame this usefull

Step 1:get any other under water tame

(or if your lucky you could find one in shallow water)

Step 2:get a ton of fish meat

Step 3:feed it and wait for a hell of a time

Pro tip:use any soothing balm to make it faster

Step 4: tame it

Step 5: get a saddle

Step 6:have fun with your basilosaurus