Chockisens were probably a known species of Tau Ceti IV. Judging on what the Marathon manual describes, it is presumed that they harassed colonists that were on the outskirts of the colony.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.