The water levels are at the moment satisfactory. We have found some dolphins, the otters are fine, but the fish has suffered mortality," chief wildlife warden Dhirendra K Singh told TOI. Our main concern is the dolphins and the smooth-coated otters and the prey base in the form of fish. CHANDIGARH: Only four of the 18-35 Indus River dolphins have been located in the Beas following a drastic cut in the water flow to enable de-siltation and repair of canal gates at the Harike barrage. Since the flushing took place in the dry season, some dolphins could have got sucked into the canals or the Satluj.