A major encounter on the high seas: 48 sperm whales sighted north of Menorca

A major encounter on the high seas: 48 sperm whales sighted north of Menorca

Sometimes a glance at the open water is enough, and the sea surprises you. In the second half of July, researchers covered about 1,100 nautical miles during a two-week expedition north of Menorca and documented 48 sperm whales. Around 20 percent of the recorded animals were juveniles — a sight that sparks conversation on land: at the harbor of Port de Pollença, in the café on Plaça Major, or during morning exercise on the Passeig Marítim in Palma.

The scientists worked as part of a project called "Moby Mummy." The aim was to systematically record the presence of these large toothed whales in an area north of Menorca and to learn more about their social structures and condition. With photographs of tail flukes and pectoral fins, hydrophones for acoustic measurements, and aerial images, they collected data that allow conclusions about body condition and possible pregnancies.

What the encounters looked like

In total there were eleven encounters: two of them were recorded acoustically only, nine both visually and by hydrophone. In the purely acoustic detections, groups of five and two animals appeared on the sonar recordings. The combined visual and acoustic encounters consisted of three solitary males and six groups totaling 38 animals; among them were nine juveniles. The largest observed group counted seven sperm whales, three of which were juveniles.

These numbers are not just statistics. On a hot August morning, when the Tramuntana sends only a faint whisper into the valley and fishermen on the quay mend their nets, reports of so many whales bring a collective sigh of relief. People who usually complain about the tourist crowds suddenly see the sea as something worth preserving. On small boats off Cala Ratjada, such as a dolphin tour with Cruceros Cormoran, or on the deck of a ferry to Menorca, the horizon is now glanced at more often and with new curiosity.

What this means for Mallorca

For the island group, the sighting is a positive sign: the presence of mother-calf groups points to areas with sufficient food and relatively undisturbed waters. This can boost local research while also encouraging boat tour operators, dive centers, and conservation initiatives such as a local seahorse-release project to align their activities more closely with protection and responsible observation. If skippers in Port d'Alcúdia and sailing schools in Cala d'Or pay more attention to keeping distance and acting calmly in future, both animals and locals will benefit in the long term.

The documented acoustic signatures are also a treasure for research: sperm whales communicate and hunt with click sounds that provide clues about social behavior and hunting strategies. Such information helps underpin the planning of protected areas — a foundation regional authorities, researchers, and stakeholders can build on.

Looking ahead

If you now stand on a quiet evening at Passeig del Born and hear the roar of the sea, you can imagine young sperm whales out there practicing their dives. The latest observations should be a reason to deepen the dialogue between research, tourism, and the local population: more quiet observation rules, expansion of citizen-science offerings, and training for boat operators would be practical steps. In this way the island remains not only a holiday destination but a habitat that amazes in the short term and is protected in the long term, supported by continued community engagement such as reports on sea-cleanup efforts off the Balearic Islands.

A summer like this is a reminder that the sea is alive. It concerns us all — the fishermen, the beach vendors, the children splashing in the bay, and everyone who listens to the sound of the waves on a mild evening.