01/20/2026
There are about 40-49 dolphin species (depending on classification, including river dolphins) and 7 porpoise species, making around 47 to 56 total species. Dolphins and porpoises are both intelligent, social marine mammals (cetaceans), but differ in key physical traits: dolphins are generally larger, have longer bodies, beak-like snouts, curved dorsal fins, and cone-shaped teeth, while porpoises are smaller, stockier, have blunt snouts, triangular dorsal fins, and spade-shaped teeth. They use echolocation for hunting and communication, but dolphins are known for complex social groups and acrobatics, whereas porpoises are shyer and travel in smaller groups or alone.
Poster prints: https://bit.ly/3LOEwHc