Sporg

Behaviour and Tactics
When approached, these mushrooms sprout from walls, ceilings and floors and spit out clusters of explosive spores (only one at a time), that slowly home in at the player. The spores explode on impact or after a short duration. Keep an eye out for the cue that signals this time-out as the explosion that follows deals 2 masks of damage in a wide area of effect.

As the Hunter's Journal entry mentions, it is possible to lure the spores back to them to kill them, but it is rather difficult to do so.

Locations
LOCATION IMAGES MISSING Споровик