Partly because their brains are roughly the same size as humans, and are similarly or superiorly complex (although differently evolved in structure), some marine biologists have speculated that dolphins, and other Cetaceans, are at least as intelligent as humans, and could have several unknown communicative abilities, that surpass human understanding.

Not to discount the dolphins, but duhhhznt take much to surpass the some human intelligence.

I'm afraid you make a good point Richclips.