Salty (Wet 'n' Wild)

Salty is the pet dog of Aquaman. While Aquaman lives in the ocean, he keeps Salty in an undisclosed place on land.

Scooby-Doo! Team-Up
When Ocean Master's army came to attack Atlantis, one of them was put off by all the people who's names began with "Aqua", and was relieved that there wasn't an "Aquadog". Aquagirl told him Aquaman did have a dog, though, named Salty, who he kept on land.

Background in other media
Salty is named after Aquadog (Prime Earth)|Aquadog (who resembles a Golden Retriever), who first appeared in Aquaman #3 (November 2011).