The Dolphin Badge is a common pet accessory in Adopt Me! that was released as part of the World Oceans Day update. It was obtainable in the WDC (Whale and Dolphin Conservation) Pin Badges Board for free.
It was displayed on a wooden board along with the other WDC Pin Badges. A player can attain a maximum of one pin badges every hour. This pin, along with the other ocean badges, was released on June 8, 2021 and left on July 8, 2021. As it is now unavailable, it can only be obtained through trading.
The Dolphin Badge features a decagon-shaped pin with a gray border and photo of a dolphin with dark blue background as well as multiple white circles that seems to resemble a bubble. This pet accessory goes on the pet's chest.