'Tianchi Monster'

A Chinese television reporter believes he filmed six "lake monsters" in Lake Tianchi, near the China/North Korea border:

"Zhuo Yongsheng, who works for a local TV station run by the administration office of the nature reserve at Mount Changbaishan, Jilin, has sent pictures of the Loch Ness-type creatures to Xinhua's Jilin provincial bureau.
"One of them showed the creatures swimming in three pairs, in parallel. Another showed them together, leaving ripples on the surface of the deep, volcanic lake." ...

He had originally gone to the mountainside to shoot the sunrise. At 5:26 am, a guide started yelling and pointing toward the water.

"He focused his lens on the black moving object in the center of the lake and five other forms emerged from the deep water.
"Zhuo said he witnessed the six seal-like, finned creatures swimming and frolicking in the lake for an hour and a half, before they ducked out of sight at 7:00 AM.
"'They could swim as fast as yachts and at times they would disappear under the water. It was impressive to see them all swimming at exactly the same pace, as if someone was giving orders,' he said. 'Their fins - or maybe wings - were longer than their bodies.'"

Rumors have circulated previously, but: "Scientists, however, have dismissed the rumors saying the lake was too cold for large creatures." (News source.)