Do not tame inside of spike fences or you will lose your precious tame and your life, as I found out. Simply place some carrots in the last item of your hot bar, feed it one and hop on right after. Have fun traveling where it wants.
Tame one and exchange their poops for things on official servers. It's literary a drogue which will make you see everything pink, then blue, then purple, and then you will travel to the candy mountain with the liopleurodon.