Months after seeing the bright new covers hit my local shop, I dove headfirst into the 2011 relaunch that reset a lot of DC's continuity. The big reboot came with 'The New 52' in September 2011, and that's when 'Aquaman' was relaunched as part of that initiative — Geoff Johns took the reins and his 'Aquaman' (volume launched in 2011) reshaped Arthur Curry for a modern audience. I still have the issue with that striking cover; the tone shifted toward big, mythic storytelling and introduced new takes on Atlantis, the Trench, and Arthur's place between land and sea.
A lot of folks today also point to 2016 when DC rolled out 'Rebirth' because that felt like another kind of relaunch for many characters, including 'Aquaman'. 'Rebirth' (spring 2016) didn't wipe everything clean the way 'The New 52' did, but it restored legacy elements and gave creators a chance to tweak origins and relationships again. For me as a reader, the 2011 relaunch was the seismic continuity reboot, while 2016's 'Rebirth' was an emotional course correction — both reshaped 'Aquaman' in different ways and are worth checking out if you want to see how Arthur evolved on the page over that decade.