Dextroluma are a very long-lived species.  Their average lifespan has historically been about five hundred years, and the oldest known Dextroluma (in recorded history, at least) lived to six hundred and sixty-nine (although some record keepers contend that she was only six hundred and sixty-six and that the number was inflated for salacious purposes).

Some might assume this means they age slowly, and after a certain age, they would be correct.  However, up until the age of twenty-one, Dextroluma aging resembles human aging.  A ten year old Dextroluma is developmentally similar to a ten year old human.

After twenty-one, visible aging slows to a crawl for most Dextroluma.  They often do not resume visibly aging until they reach their last century.  Of course, this is not true of all - some Dextroluma do experience visible aging at younger ages.  The reasons are sometimes unclear but typically relate to experiencing significant diseases or significant life stresses.