When it comes to taming this guy, I personally like to hop on a high level spino. The spino easily deals with anything surrounding the basil, and then go ahead and start feeding it. I use kibble, it's a pretty fast tame, but the time between the first and second feeding feels like forever.
This creature is so easy to tame. All you need is:
1. An Ichthyosaurus(these guy won't be attack by any water creature, except the jellyfish)
2. Anykind of meat(I suggest using prime meat and don't use fish meat)
3. Find one of these creature
4. Feed it prime meat(It's a long time between the 1st and the 2nd feed, after the 2nd feed it's fast)
And then you get one of these, just be careful of the megalodons, they will attack right after it is tamed. I hope this is useful for you<3