smart animals and playful.
had to google what the differences were.
there are 3 main differences between dolphins and porpoises, that is, porpoises are divided in to 6 species and sub species, while dolphins are divided into 40 different main types, the average dolphin is generally longer than the average porpoise, and the most obvious visible difference between the two groups is that porpoises have flattened, spade-shaped teeth.
Another difference is that there are more fused neck vertebrae in porpoises than in dolphins, which limits the range of mobility in the porpoise neck.