A while ago I found a scientific research paper/dissertation that investigated the lifespans and sex changes of 3 different angelfish species in the wild:
Centropyge loricula:
Lifespan in the wild up to 8 years.
Start out as females and change into males (if dominant).
Recent research suggests that males may also be able to revert back to females.
These findings likely apply to all closely related species.
Centropyge bicolor:
Lifespan in the wild up to 18 years.
Start out as females and change into males (if dominant).
Pomacanthus sexstriatus:
Lifespan in the wild up to 60 years.
Start out as immature bisexual and change permanently into females or males when maturing. Ño sex change later.
This applies almost certainly to all 3 species of the Euxiphipops group (P. navachus, P. xanthometopon, P. sexstriatus) and most likely also to all of the other Pomacanthus species.
This research shows a clear correlation between size and lifespan so it can be deducted that pygmy angels from the acanthops complex have shorter lifespans than the loricula sized dwarf angels.
And while with good care dwarf and pygmy angels might get older in captivity than in the wild, the majority will likely perish before their time.
Unfortunately it is rather unlikely that most large angels get to live as long in captivity as they might in the wild...
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