The pods do indeed seem large enough to house kobolds, though you do not dwell on the fact long as Tuk's strikes results in the severing of one of the stalks. The separate pieces quiver and squirm like a cut worm and black ichor sprays all around in Tuk's vicinity.
The pod deflates a bit and sinks deep into the depths of the pool. A moment later a series of bubbles froths to the top and a gurgling creature flops over the side of the pool and onto shore. It stumbles forward after the closer Tuk, then falls onto its face into the dark vegetation. The creature twitches as its breath becomes shallow and stops due to half-formed lungs.
As you take a closer look you realize the goo-covered creature is a only partially mutated kobold, not fully transformed. For a brief moment, John and Scrag believe they see tiny worms squirming inside the goo of the creature.
OOC: Tuk needs to roll DC 12 Reflex check to avoid being covered in black goo.