Since the past day or so every time I've gone out that way I've been immediately hit by 5-7 mobs of Hydras (each Mob being 2 or 3 Hydras) and then just round the corner by the second collector I get hit by 8-12 mobs...seems that the Breeding Programme is working

I can just about get through by running but there is not much chance of standing around and getting hit by 10-21 fireballs and meteors in 1 go...and that's before I get to the second lot...
Maybe a Hydra Relocation Programme is now needed

