Sharks of Gor
This research is done on the series of books written by John Norman, the comments in italics are mine and my point of view.
Woman of Gor

I ran to the stern that I might watch. Half out of the water, then returning to it, I saw a great
speckled grunt, four-gilled. It dove, and swirled away. Another man came to help with the line. I
observed the struggle. One often fishes from the ships on Thassa, and the diet of the sailors
consists, in part, of the catch. Part of each catch is commonly saved, to serve as bait for the next.
I cried out with fear. One of the men shouted with anger. Rising from under the grunt swiftly was
a long-bodied shark, white, nine-gilled. It tore the grunt from the line and bore it away. Other
dorsal fins, of smaller sharks, trailed it, waiting. Sharks, and sometimes marine saurians,
sometimes trail the ships, to secure discarded garbage and rob the lines of the fishermen. The
convoy, by its size, had doubtless attracted many such monsters. I had seen, yesterday, the
long neck of a marine saurian lift from the waters of gleaming Thassa, It had a small head, and
rows of small teeth. Its appendages were like broad paddles. Then it had lowered its head and
disappeared. Such beasts, in spite of their frightening appearance, are apparently harmless to
men. They can take only bits of garbage and small fish. Certain related species thrive on
crustaceans found among aquatic flora. Further, such beasts are rare. Some sailors, reportedly,
have never seen one. Far more common, and dangerous, are certain fishlike marine saurians,
with long, toothed snouts; they are silent and aggressive, and sailors fear them as they do the
long-bodied sharks. The sea sleen, vicious, fanged aquatic mammals, apparently related to the
land forms of sleen, are the swiftest predators to be found in Thassa; further, they are generally
conceded to be the most dangerous; they tend, however, to frequent northern waters.
Occasionally they have been found as far south, however, as the shores of Cos and the deep
inlets of Tyros. Slavegirl of Gor, page 360


The rence growers, in spite of the value of their product, and the value of the articles taken in
exchange for it, and the protection of the marshes, and the rence and fish which give them
ample substenance, do not have an easy life. Not only must they fear the marsh sharks and the
carnivorous eels which frequent the lower delta, not to mention the various species of
aggressive water tharlarion and the winged, monstrous, hissing, predatory UI, but they must
fear, perhaps most of all, men, and of these, most of all, the men of Port Kar. Raiders of Gor,
page 8

My leg slipped from the island into the water and suddenly a tiny tharlarion struck it, seizing his
bit of flesh and backing, tail whipping, away. My leg was out of the water, but now the water
seemed yellow with the flashing bodies of tiny tharlarion, and beyond them, I heard the hoarse
grunting of the great marsh tharlarion, some of which grow to be more than thirty feet in length,
weighing more than half a hundred men. Beyond them would be the almost eel-like, long-bodied,
nine-gilled Gorean marsh sharks. Raiders of Gor, page 58

River Shark

As we slid to the back of the wagon our ankle rings were removed. Then, naked, unchained, we
were herded to the river edge of the wooden pier. I was cold. I saw a sudden movement in the
water. Something, with a twist of its great spine, had suddenly darted from the waters under
the pier and entered the current of the Laurius. I saw the flash of a triangular, black dorsal fin.

I screamed.

Lana looked out, pointing after it. "A river shark," she cried, excitedly. Several of the girls looked
after it, the fin cutting the waters and disappearing in the fog on the surface. Captive of Gor,
page 79