Pilot Whale: Where and when to dive with them

Encountering pilot whales underwater is a rare and extraordinary privilege, demanding the utmost respect and adherence to strict ethical guidelines. If a chance encounter occurs during a dive, divers should maintain a calm, non-threatening demeanor, avoiding sudden movements or loud noises that could disturb the animals. Never chase, pursue, or attempt to touch pilot whales. Maintain a respectful distance, typically at least 50 meters (164 feet), although local regulations may stipulate specific minimum approach distances, which must always be followed. Observe their behavior; if they show signs of distress or avoidance (e.g., rapid swimming away, changes in breathing patterns), retreat immediately. Photographing is generally acceptable from a distance without intrusive lighting. Remember that pilot whales are federally protected species in many regions, and interacting with them in ways that alter their natural behavior can be illegal and harmful. Focus on appreciating their presence from a distance, minimizing your impact, and ensuring the safety and well-being of these magnificent marine mammals. Never feed wildlife. Always check with your dive operator and local authorities for the most current regulations regarding marine mammal interactions in your specific dive location.

Encounters with pilot whales are generally opportunistic and unpredictable due to their offshore, nomadic nature. However, certain regions and seasons offer slightly increased chances. In the Azores, summer months from June to September are often cited as the best time for encounters, coinciding with warmer waters and peak squid productivity. Similarly, around the Canary Islands, while possible year-round, late spring to early autumn (May to October) can be productive. In the Galapagos, they are present year-round, but specific movements are often tied to oceanographic conditions like the El Niño-Southern Oscillation (ENSO) that influence prey distribution. For divers in Hawaii, encounters are rare but possible at any time, with no distinct peak season. Always remember that due to their pelagic behavior, spotting them requires significant luck and often involves dedicated offshore expeditions rather than typical reef dives.

Pilot whales, specifically the short-finned pilot whale (Globicephala macrorhynchus), are a pelagic species found in tropical and warm-temperate waters worldwide. Unlike many whale species, they primarily inhabit deep offshore environments and rarely venture into shallow coastal areas, though exceptions occur. Their range extends across vast oceanic expanses, including the Atlantic, Pacific, and Indian Oceans. Key regions where divers might encounter them, albeit opportunistically, include the waters surrounding the Azores, the Canary Islands, the Galapagos Archipelago, and occasionally offshore of Hawaii. They tend to prefer areas with steep drop-offs and oceanic seamounts where their prey is abundant. While they do not undertake true migrations in the rigid sense of baleen whales, their movements are often influenced by the distribution of their preferred food sources, which can lead to seasonal aggregations in certain areas.

Pilot whales are primarily cephalopod specialists, with squid making up the overwhelming majority of their diet. They are known to consume a wide variety of squid species, including those found at considerable depths. Their hunting strategy involves deep-diving in coordinated groups, often at night, to forage for these elusive prey. While squid are paramount, they may also supplement their diet with octopus and small fish, particularly when squid populations are scarce. Their conical, numerous teeth are well-adapted for gripping slippery prey rather than tearing. Pilot whales often exhibit a highly social hunting behavior, using echolocation to locate prey in the dark, deep ocean, and then working together to herd or capture it, showcasing sophisticated group dynamics.