Use kibble and use baryonyx Also focal chilly

Step1-make focal chilly

Step2-get you basilosaurus near land

Step3-feed it and swim to land so manta cannot kill you

Step4- get baryonyx in water and do spin attack and kill the mantas and tame the basilosaurus

Step 5 eat focal chilly and tame it

Step 6- put saddle on it

Step 7-take it for a ride

More Basilosaurus Taming & KO Tips