Few of the liquivores of Darwin IV have true jaws and as they "see" with sonar, none possess eyes. This close-up study of the bolt-tongue shows the forward sensory package and tongue sheath, which at a distance can look eerily like a head with eyes.

The bolt-tongue is a multicolored, liquivorous, predatory bipedalien from the tundra around Glacier Cap North on Darwin IV, closely related to the arrowtongue, rayback and prairie-ram. It is easily distinguished form its cousins by the white coloration on its back and on the top of its head.

Prey includes arctic sedge-sliders and Unths.

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