Aquaman was literally born in Atlantis. In many story lines, he is the actual king of Atlantis. As a member of the Justice League, he can live in various places.
Aquaman is able to communicate with all marine life telepathically, often from a very broad distance. He is sometimes able to affect other animals as well, including animals like eagles. However, it should be noted that Aquaman was adapted to live in some of the most difficult conditions on the planet, conditions which are particularly hostile to humans. He has superhuman strength, endurance, senses, agility, and healing as a result. His skin is also nearly impenetrable.
Aquaman’s nemesis is usually Black Manta. Ocean Master is another villain from the Aquaman series. As such, the series never really takes Aquaman far from home.