Hydra's and attacks

[wraithstrike]

Do they still get all their heads to attack as an attack action like they did in 3.5?

[Are]

No, they now have to use a full attack in order to attack with all their heads.

[James Jacobs]

Are wrote:

No, they now have to use a full attack in order to attack with all their heads.

Unless they use their pounce ability, which allows them to charge and make all attacks.

[Name Violation]

so basically "most" of the time