Dolphins are not even as smart as rats

I caught something on NPR a couple of nights ago, but I had a short drive so I didn’t catch it all.

The voice on the radio said that a South African researcher wrote (in an article or book) that dolphins do have large brains, but that they are ‘not even as smart as rats’.

Did anyone else hear this? If so, do you remember the South African who made the claim, and where?

We just did this one. In summary, he thinks aren’t bright because they won’t jump out of their tanks like the brilliant goldfish do sometimes. Others are reviewing his conclusions.

But it’s hiding out over in MPSIMS: Latest theory - dolphins are actually pretty stupid!

I missed it.

Mods, please close.