James H Schmitz's "Grandpa" (novelette, adventure, free)

This appears to be a widely anthologized story.

Story summary.

A group of early explorers on the newly opened world of Sutang is trapped by a local lifeform. Only the ingenuity of our teenage hero can save the group's life...

Collected in.

1. James H Schmitz's "The Hub: Dangerous Territory".

Fact sheet.

First published: Astounding, February 1955.
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Rating: A.
Among the stories from Astounding/Analog issues edited by John Campbell.
Related: Stories of James H Schmitz.