Lake Baikal Aquatic Humanoids: The Baikal Swimmers (1982)

Lake Baikal, Siberia. Buryat and Russian legends had long filled its water with strange beings: the "pharaohs," human above and fish below, and Lusud-Khan, the Water Dragon Master. In 1982, the story goes, Soviet military divers met something new.

Off the western shore, at about 50 meters, the divers saw swimmers several times. The figures were human-like but huge, almost three meters tall. They wore tight-fitting silvery suits despite the icy-cold water. They had no aqualungs or fins, only sphere-like helmets concealing their heads. They moved very quickly.

Commanders ordered seven divers to catch one with nets. As the divers closed in, something struck. One account describes "a blow of enormous force" that "literally threw Soviet aquanauts to the water's surface."

Seven men rose far too fast. Three died of decompression sickness. The other four were treated in the chamber but left as grave invalids.

No diver has ever been named. The account traces back to Maj. Gen. V. Demyanenko, described as chief diver of the Soviet Army engineering troops, who reportedly told it at Lake Issyk-Kul as a safety warning: do not repeat the mistake of trying to catch the swimmers. Diving trainers Mark Shteynberg and Lt. Col. Gennady Zverev heard him, and Shteynberg wrote it up. Paul Stonehill later translated a version published in 1992. Then Prof. Vladimir Azhazha, a leading Russian ufologist, carried it into books and onto television.

Online, it is often called part of a 2009 release of declassified Russian Navy UFO files. No such document exists. The story is at least 17 years older than those press reports.

Brian Dunning examined the case for Skeptoid in 2021. His verdict: "no reliable provenance, no original source, certainly no corroboration." He saw fourth-hand hearsay that began as a cautionary tale about decompression.

Irkutsk journalist Sergey Volkov checked with the diving community at a training centre in Severobaykalsk. That centre was founded only in 1996 and had no decompression chamber in 1982. Local divers and officers there laughed and called the story complete nonsense. Asked directly, Azhazha could not recall where his information came from. Volkov concluded it was invented folklore.

One explanation is that a teaching tale about rapid ascent grew with each retelling. Its versions disagree on summer or winter under the ice, and on one chamber or two. No surviving diver is identified or quoted in the available accounts. In the 1990s Nikolai Kireev, a fisherman from Kultuk, reported large silver human-shaped figures leaping from the lake. Some point to nerpa, the Baikal seals with pale grey-white bellies.

The Baikal swimmers now surface in podcasts such as Hysteria 51 and in TV programmes that promote alien visitation. No photograph, record or grave has ever been found. The legend endures anyway.