Let me elaborate, how likely is that there’s an animal on earth that’s smarter than us? By smarter, I understand intelligence is a nuanced topic unique to different animals, so for the sake of argument, let’s talk about, mathematics, critical thinking about where and how to apply those mathematical concepts, and creativity in any form.
The past 30 years of studies conducted on them.
All of the things you’ve highlighted, except speaking to dolphins, are things primates also do.
The very specific topic for this post, were applied mathematics and critical thinking. And no, orcas do not show any advanced application of mathematics.
If you know of a study that indicates their understanding and application of mathematics rivals ours. Please link it.