Eel - Vosk

 An additional problem, at least to a swimmer, I had gathered, from talking with some of the soldiers, were Vosk eels. These often lurk in shadowed areas, among the pilings beneath piers. Whereas they normally feed on garbage and small fish it is not unknown that they attack swimmers.

Renegades of Gor Book 23 Page 153

Then, a bit after noon, I shrieked with horror, for something, long, and snakelike, had slid between the bars and brushed across my body. "Help! Help!" I cried. Then the thing, with a snap of its long, smooth body, had darted away. "Help!" I screamed. "What is wrong?" asked a voice from above. I knew not who it was. "A snake," I cried, "a water snake!" "There are no water snakes here," called the voice. "The current discourages them. It is most likely an eel, a Vosk eel." "Help!" I cried. "Call my master. Save me!" But I received no response to my cry. Toward nightfall another such intruder passed between the bars of the cage. I felt its body slide over my left leg. During the night four more such visitants traversed the cage.

Plunder of Gor     Book 34     Page 122

I had also had it confirmed that the snakelike visitants that had so frightened and discomfited me in my tenure in the mostly submerged cage were not water snakes, which tend to favor still water, but eels, in all probability Vosk eels, a form of river eel. Such eels, as other eels, are omnivorous, but, free swimming, are accustomed to feed on small fish and plants. They are unlikely to attack human beings, unlike pool eels, unless their nests are threatened. They are found in fresh water, but return, through the delta of the Vosk, to the salt water of vast, turbulent Thassa to spawn.

Plunder of Gor     Book 34     Page 139