Hippo Tang is probably the oldest and he's now about 7-8". Also have a pair of black percula clownfish, a pajama cardinal and a coral beauty plus one remaining blue chromis all purchased prior to 2016. Next are male and two female lyretail anthia purchased in 2019 and I've since added several additional females.
Other fish are 3 years old or less: red-headed solon wrasse, leopard wrasse, pair of blue throat triggers, purple eyed ring tailed cardinals, couple of small blue-green chromis and a filefish.