With the Titans re appearance 460 years ago the world faced rejuvenation many species were wiped out when this happened. and new species arised from this time.Ultimately the threat was adverted but the land scape had changed where it had happen
New continent between Ek Kal and northrend many new islands were made after the great upheaval when Queen Azshara gained control of Neptulons trident raising many islands aswell as nazjatar
Naga are still a big threat to sailors but only attack if provoked. they are tolerated in Horde and Alliance Cities through a mutual trade agreement.
Naga still live in water but are capable of surface travel like a water snake and can last on land for several days.