R6

He let the whirlpool suck him in. As soon as his feet touched sand, he pushed hard against the riverbed propelling his body upwards, and he emerged.

"There it is!" his people cheered him from the beach.

Turning around to follow their pointing, he noticed bubbles on the surface. River was slowly taking the bubbles and foam away, but it was clear now where the beast was hiding. He gripped his stone cudgel tighter and tried to aproach the current, jumping off the riverbed. Water was too murky and cloudy so he didn't see blood, though he was sure the monster was injured. Before diving again, he tried to estimate where the position of the net was. Sucking air thirstily he filled his lungs and disappeared into the depths.

Something kicked against his rib, he lost air, but still could keep diving. Tried to catch the foot or fin of that slippery creature trying to whack him across the chest. Fighting defensively, his hands finally gripped slimey skin of the riversnake as he pulled fiercely upwards. He started swimming hard using mostly his legs, trying to stay above the surface. As soon as his arm was free of the river, he slashed downwards with his heavy stone club. Judging by splashing and vigourous wiggling of his other arm, it seems he didn't hit the beast. Continued to flail and whack across the water, almost hitting himself, he was now almost in the shallows. Feet burying deep into mud, he felt his strength regenerating as it was more and more easy to drag the snakelike fish towards the coast. Here and there, other braves started emerging from the water and joining the fray.

"Hold it, grip it!" they cheered him on, looking forward to this catch...