well that wouldn't really fit zombies would it? zombies are just humans that have been infected by a parasite or a disease why would they be coming out of the water unless mass amounts of people just walked into the water as they were being infected.
actually, for those of you 'against' this idea ..... this came up as a side note in some other threads about ship wrecks. The idea was that a ship wreck should occur in game (in real time) as an one time 'event' on a fresh server, and would;
A: release a zombie horde on to the beach (bodies washed up, those who drown walking on the sea floor)
B: a partially zed infested [possible] new base area (once cleared and taken by players)
this was also mentioned for a plane crash event occurring on the sea but ending on land
Makes me think of... Zombie (1970 something) a zombie fights a shark underwater... can't remember if the zed bites the shark or if the shark wins (need to YT that one) it's not a Romero movie but generally follows the same zed rules...
Maybe it would just depend on the rule of how we turn... is it TWD style where no matter how you die you'll turn or is it an infection so you'd need to be infected to turn... either way zeds traversing underwater
Edit: Also the reason I like this is I have been thinking of ways on which Black Island is kept populated by zombies (because we don't want them to go extinct...do we?) so any ideas of zombies appearing or making their way onto the island ie. ship wreck, plane crash etc is a good thought too me.