Depends on diet. Rays raised on pellets I’ve noticed late maturity. Rays raised on worms, tilapia, shrimp or something of that nature quicker maturity. I would expect 2 years for generally most rays. P14s tend to be late bloomers
I've heard as young as 20 months with pearls. Mine are almost 18 months and look at least a year away from breeding. But my perspective is with blackies