Ignore posts about taming bar going down, you need to tame it using only the food you give it from the start, if you change the type of food you give it, it then resets the taming bar

It takes a while to eat the second time, so don't fret

Can apparently fight cnidaria without getting electrocuted

If only it had a horn then it could be a narwhal

To tame the basilosaurus it's a passive tame so kill every thing around it and start feeding it

Is not affected by Cnidaria or electrophorus shocks, this in addition to its surface healing makes it a great mount

It's best to get a baryonyx to stun and kill every manta around it

Rare Flowers affect the Basilo (slightly inconsistently) allowing you to kite it into your own water pen for a super safe, even easier tame involving much less swimming about. Seems to require you to eat at least 2 flowers to trigger the aggro effect, and it loses aggro the second the effect ends.

Take care... They are surounded by Mantas which block you... So you can't run away. 10 of them kill almost everything.

The one I came across had mantas around it...LOTS. thought I killed em all... Nope. Make extra sure you kill them, and look around a bunch before attempting anything with it

Bring baryonx it stubs mantas up vote so people see dis

When Taming: DO NOT CHANGE THE FOOD YOU ARE USING TO MAKE IT GO FASTER, IT WILL DRAIN IT’S PROGRESS. Ex: Using meat then switching to prime then back to meat.

The easiest way to tame this whale is to bring a Baryonyx with ya to deal with the manta's and sharks and to wear scuba gear. Once the sharks and manta are dead just passive tame the whale with either prime meat or Theriz Kibble.

This is by far one of the best water tames, has insane health regen and if you boost melee you can easily solo kill mosa and tuso alphas, good for jellyfish because cant be stunned. And keeps you warm underwater!

The basilosaurus is the king of the ocean. Nothing can stop a perfect tamed 150. Really good to farm black pearls off alpha mosas n squids.

When taming be aware that the mantas around it will be passive until you start feeding it. It sprays a red mist like the pachyrhino that Argos everything nearby to attack you.

When taming the time between the first and second feed takes forever. To avoid this move well out of render and back again and it will be ready to feed 👍 Also upon your return be sure to kill everything in the area before continuing. Essentially an under water rex. great all round beast.

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.

He feeds quite quickly, if you find it's taking longer than usual. Move away for a minute as he may be spooked.
He took my mutton every 10 seconds

Even if you don't tame it, it still gives you quite a bit of oil when harvested, as well as prime.