Pilot Whale Strandings in Indonesia: Causes, Places and Rescue
Pilot whales have stranded in large groups on Indonesian coasts. Two cases have known dates and places: a stranding on the coast of Sabu Raijua Regency in East Nusa Tenggara in October 2012, and a stranding at Modung on Madura in February 2021. A mass stranding is an emergency for the animals involved. It is not a wildlife-viewing opportunity, and a visitor who arrives at a stranding scene can make the situation worse. This page explains what happened in these two cases, what the species is, and what to do if you come across a stranded whale.
The 2012 stranding on the Sabu Raijua coast
On 1 October 2012, 46 pilot whales stranded together along the coast of Deme village in Liae district, Sabu Raijua Regency. Only a few of the animals survived, and most of the group died. The event is a reminder that a stranding can affect a whole group at once, not just a single animal that became separated from its companions.
The 2021 stranding at Modung, Madura
On Thursday 18 February 2021, 52 short-finned pilot whales came ashore on the Patereman coast in Modung subdistrict, Bangkalan Regency, on Madura. Most of the group died on the beach. Three whales were released back into the sea, but two of them came back to the shore and died. One live animal remained at the site after that attempt.
The Modung case shows why a rescue is more complicated than pushing a whale back into the sea. An animal that appears alive can be too weak to stay afloat, and a release can fail more than once. The event also shows that the outcome of a single animal does not tell the full story of a stranding, because the rest of the group may already be lost by the time help arrives.
Madura belongs to East Java province. For travellers planning a wider trip in the province, the East Java travel guide covers the island and the routes around it. A stranding site, however, is not part of a usual visitor circuit, and nothing about the coast there should be treated as a wildlife attraction.
What a pilot whale is
Pilot whales are toothed whales of the dolphin family, Delphinidae. Their size and common name make them easy to mistake for a baleen whale or a solitary giant, but they are a sociable group-living species. The short-finned pilot whale, the species in the 2021 case, has the scientific name Globicephala macrorhynchus.
The species has a large, bulbous forehead, called the melon, and no obvious beak. Its dorsal fin is low, with a wide base, and it sits about a third of the way back from the head. The flippers are shorter than those of its close relative, the long-finned pilot whale.
Short-finned pilot whales feed mainly on squid, with some fish and octopus, and they forage in moderately deep water. They travel in social groups, and groups often number in the tens of animals. Close social bonds are one reason a group can strand together, although the causes of any single stranding are rarely simple.
Telling the two pilot whale species apart
Short-finned and long-finned pilot whales are very hard to tell apart in the field and at sea. A photograph or a brief look from the shore is not enough to name the species with confidence. Identification is a task for trained responders, who can check the body shape, the flippers and the fin in detail.
Why whales strand
Whales can strand for several reasons, including illness, injury, disorientation and becoming trapped as the tide falls. Each event has to be looked at on its own terms, and a visitor on the shore has no way of knowing which factor applies.
In the Modung case, early explanations included extreme weather and pollution, but a rescuer said the cause could not be concluded until necropsy results were available. That position is the honest one. A stranding is not explained by a crowd’s first impression or by the look of the beach, and a dramatic theory should not be repeated as fact.
Shape of the shore and the depth of the water can affect whether a whale that has moved into shallow water can find its way back to deeper water. A gently sloping beach can keep an animal in shallow water over a long distance. Local currents, tide and the condition of the animal all matter, and none of them can be read from the sand alone.
What to do if you find a stranded whale
- Keep your distance. Leave a clear buffer around the animal and the responders. A large whale can move suddenly, and nearby people can block lifting, examination or access to the water.
- Do not push, pull, roll or tow it. Do not touch the blowhole, mouth, fins or tail, and do not try to drag it with a rope, vehicle or boat.
- Do not pour water into the blowhole or cover the animal’s face. Keep water away from the breathing opening, and follow a responder’s instructions if they ask bystanders to help with a specific task.
- Keep dogs and other animals away. Do not feed the whale, pour anything on it or climb onto it for a photograph.
- Alert local authorities or the nearest marine-mammal response team. Give the beach or village name, the nearest recognisable access point, the time you saw the animal, whether it is breathing or moving, and whether other animals are nearby. A location pin and a photograph taken from a distance can help identify the site.
- Share observations carefully. State what you saw and when. Do not name a cause of death, do not claim an animal has been rescued, and do not post graphic close-ups as though they were an official update.
If you are already at the scene, the most useful contribution may be to stop a second crowd from gathering. Leave room for responders and their equipment, keep the access path open and avoid repeating instructions that conflict with the local team. Do not enter the water to help. Surf, current, submerged rock and the animal’s own movements create risks that are hard to judge from the beach.
Watching from the shore
A stranding is not a reason to detour to a beach. A crowd’s presence is not permission to approach, film close up or help move an animal. Stay on the shore, stay back from the water’s edge and let the people with equipment and training do their work.
Those who wish to see pilot whales in their natural setting need a different kind of trip altogether. Pilot whales usually live offshore, and they are not reliably seen from a beach. The moment that brings a whale to the shore is an emergency, and it is not something a traveller can plan for.
Reading a stranding event as a traveller
When a stranding is reported, look for the date, the exact village or beach, the species identification if one has been made, and whether the animals are alive or dead. Early information changes quickly, and a first description of a cause can be replaced once the animals have been examined.
Indonesia’s marine wildlife includes many animals beyond pilot whales. The Indonesia wildlife guide gives broader context for the country’s wildlife pages, and it is a better starting point for planning time on the water than a stranding site.
Questions about pilot whale strandings in Indonesia
Are Madura and Sabu Raijua places to see pilot whales?
No. Both places have had mass strandings, but that does not make them predictable viewing locations. A stranding is an emergency, not a wildlife encounter to plan around.
What happened to the whales from the 2021 Modung stranding?
Most of the group of 52 died on the beach. Three whales were released back into the sea, and two of them died after returning. One live animal remained at the site.
Can a stranded whale be saved by pushing it back into the sea?
Not safely as a general rule. A whale may be sick or injured, and surf, a steep shore or a crowd can make a return attempt dangerous. Keep back and let trained responders decide whether and how a live animal can be refloated.
Why is it hard to tell the two pilot whale species apart?
The short-finned and long-finned pilot whales look very similar at sea, and the main differences, such as flipper length, are difficult to judge from a distance. Naming the species is a job for trained responders with a close view of the animal.
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