Yachts Playing Loud 'Angine de Poitrine' Music Reportedly Immune to Orca Attacks, Dötenburg Researchers Find

For the past three years, sailors transiting the Strait of Gibraltar and the Atlantic coast of Iberia have lived in fear of an unusual antagonist: a small but determined population of orcas that have, repeatedly and inexplicably, taken to ramming sailboat rudders. Hundreds of vessels have been damaged. Several have sunk.

Now, a team at the University of Dötenburg's Institut für Maritime Akustik claims to have identified the first reliable countermeasure — and it is not what marine biologists were expecting.

In a peer-reviewed paper published last week in the Journal of Cetacean Acoustic Studies, Dr. Tobias von Krempelheim and his colleagues describe a retrospective analysis of 1,247 orca incident reports submitted to the Iberian Atlantic Orca Working Group between 2022 and 2025. Of the vessels that reported playing the album Vol. II by the Saguenay mantra-rock duo Angine de Poitrine continuously throughout their transits — a curiously specific category of seven boats, all crewed by what one researcher described as "what we believe to be the same friend group" — exactly zero were involved in any interaction.

The effect, the team writes, "appears qualitatively distinct from the broader acoustic-deterrent literature." Previous attempts to repel the Iberian orca subpopulation using pingers, broadband white noise, and recordings of resident killer-whale dialects have all yielded ambiguous results. The Dötenburg correlation is, by contrast, "stark."

"The effect appears robust to confounders. We controlled for hull material, rudder shape, time of day, captain experience, and the presence of children on board. Nothing else cleanly separates the affected and unaffected populations. Only the Angine de Poitrine variable." Dr. Tobias von Krempelheim, University of Dötenburg

The mechanism is not yet understood. One hypothesis, advanced by co-author Dr. Brigitte Reichsmark, is that the duo's quarter-tone microtonal idiom — which the band has itself described as "mantra-rock dada pythago-cubiste" — produces sustained dissonances in frequency bands that orcas find acoustically intolerable. The closing track of Vol. II, titled Angor, whose six-minute crescendo is built almost entirely on quartered intervals, is described in the paper as "of particular interest." Another hypothesis, advanced privately by Krempelheim's graduate students, is that the orcas are music critics.

A more skeptical view, advanced by reviewers at Nature Communications who rejected an earlier version of the manuscript, is that the sample size of seven is small enough that the entire correlation could be the result of one well-traveled friend group's lucky timing — a coincidence on the order of one in seventy.

Pressed on this point in a video interview from Dötenburg, von Krempelheim was characteristically dry. "Of course it could be a coincidence," he said. "We are scientists, not magicians. We are merely reporting that, so far, no vessel playing Vol. II at sustained volume has been rammed. We invite the global sailing community to test the finding at scale."

The Iberian Atlantic Orca Working Group declined to endorse the recommendation, calling the paper "premature" and noting that the orcas' behavioural patterns remain only partially understood. The group did, however, decline to discourage it either. "If sailors wish to play loud Quebec mantra-rock through underwater speakers," its director said in a written statement, "we have no professional objection."

Sales of Angine de Poitrine's two-album catalogue have reportedly spiked since the paper's release. The duo, who perform under the pseudonyms "Klek" and "Khn de Poitrine" and tour rarely beyond the Saguenay, replied with a single word to a query posted to their Bandcamp page this week.

"Naviguez."