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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.

All the dolphins at the center are trained to retrieve trash that has mistakenly fallen in to their pools. Upon seeing a nearby trainer, they are to take said trash to the trainer. In return, they receive a fish for their cleanliness.

Dolphins have long been observed to take great care and exhibit much intelligence in their day to day lives. Scientists have observed a dolphin using the spiny body of a dead scorpion fish to extricate a moray eel out of a crevice.

But it isn’t just these behaviors that seem to prove their intelligence, but also the commonalities with humans in the way that they play and learn.