The entities roll towards the security team, the spheres that make up their mass undulating and pulsing weirdly. Some spheres wrinkle and flatten, their colour and consistency changing until they are razor-edged discs, spinning like bonesaws. Other spheres ripple and become partially translucent, and you can see shapes inside. There's something inside each sphere, a tangled ropy mess of strands and knots.
As instructed, the security team retreat. The entities follow them, but never come closer than a dozen metres from either the troopers or the shuttle. The security team piles back on board and takes off. A jet of hot exhaust washes over one of the entities, which seems to shiver and bubble in response. As soon as the shuttle leaves the ground, the entities bolt forward, jostling for position on the section of smoking rock where the shuttle was parked. The biggest entity win and flattens itself out on the outline left by the shuttle's jets; the other sphere-things roll back into the warm waters of the lake.
The security team are still tracking the motion of the smaller entity, the one that appeared to have the missing survey probe inside itself. They can chase that over the hills and into the distant jungle.
Alternatively, there are the hot caves where all this started, where the probe initially went missing and where Luis Wirren was attacked, presumably by these sphere-things.
The shuttle's also carrying another probe drone, which you could send into the murky waters of the lake below.
How Do You Proceed?