This photo helps you understand how big a bottlenose dolphin is, as these two dolphins are right next to people.

Average size: The average Atlantic bottlenose dolphin measures ten to twelve feet long, with males typically being larger than females.

Average weight: Atlantic bottlenose dolphins normally weigh around 1,000 pounds or more.

We have noticed that populations of bottlenose dolphins found in rivers and bays (like the group I’m helping to study in the Gulf of Mexico) tend to be smaller than ones found off of mainland beaches. Some people call these smaller dolphins “lagoon dolphins.”

There are many different subspecies of bottlenose dolphin, and they range in size. The subspecies known as “Moray Firth dolphins” tend to be some of the biggest bottlenose dolphins, and lagoon dolphins are some of the smallest.