Creature Abilities
Source Alien Core pg. 208
The following creature abilities are listed here because they are shared by many creatures or are highly complex. The statistics for individual creatures might alter the traits, the number of actions, or other rules of these abilities. Anything noted in a specific creature's stat block overrides the general rules for the ability below. In these abilities, “monster” is used for the creature that has the ability, to differentiate it from any other creatures the ability might affect.
Hover
Source Alien Core pg. 209
When a monster's land speed indicates that the creature hovers, its land Speed represents how fast it can move while hovering within 5 feet of a solid surface. Hovering creatures don't count as flying but might be able to avoid certain types of difficult or hazardous terrain, at the GM's discretion.