Off the coast of Lady Elliot Island in Australia, a single bottlenose dolphin has quietly rewritten what scientists thought they knew about how cetaceans feed. Between 2021 and 2025, researchers documented a dolphin nicknamed Bubbles deliberately chasing fish until they vomited, then consuming the expelled meal — a behavior known as kleptoparasitism, never before recorded in whales, dolphins, or porpoises. Whether this represents one creature's solitary ingenuity or the early signs of a spreading cultural practice, it reminds us that nature's inventiveness rarely waits for our permission to su
Dolphin 'Bubbles' Uses Rare Bullying Tactic to Steal Regurgitated Fish Meals
He chased them until they vomited, then ate what came up.
Mark
So this dolphin is basically making fish throw up and eating the vomit. Is that actually a hunting strategy, or is it just weird behavior?
Mimi
It's a real feeding tactic. The researchers call it kleptoparasitism—stealing food that another animal has already caught and processed. Bubbles forces the fish to regurgitate, then eats what comes out. It's deliberate and repeated.
Luke
But we should be clear: they documented this happening eleven times out of twenty encounters. That's not every chase. What happened in the other nine? Did the fish not vomit, or did Bubbles just move on?
Mimi
The study doesn't specify. We know he chased them, but whether they refused to regurgitate or whether Bubbles abandoned the pursuit isn't detailed.
Mark
Why would a fish throw up when chased? Is Bubbles doing something specific to trigger it, or is it just stress?
Mimi
The study doesn't explain the mechanism. It's possible the intense pursuit and echolocation clicks stress the fish enough to cause regurgitation, but that's inference, not confirmed.
Luke
Right. And here's another gap: they say this could be energy-efficient compared to hunting normally, but they admit they don't actually know if it is. They haven't measured the energy cost of the chase versus the energy gained from the regurgitated meal.
Mark
So Bubbles might be working harder for less food?
Mimi
Possibly. Or it might be a smart shortcut. We just don't have the data yet.
Luke
And the biggest unknown: is this Bubbles being creative, or is he part of a local population that does this? They haven't seen it in other dolphins, but that doesn't mean it's not happening.
Mark
So we're watching something that might be completely new, or might be the tip of something larger.
Mimi
Exactly. One dolphin, five years of observation, and a lot of questions still open.
El Pulso
- A dolphin near Australia's Great Barrier Reef has been caught exploiting a feeding loophole that no cetacean has ever been documented using before.
- Over five years and twenty recorded encounters, Bubbles chased Bigeye Trevally into regurgitating their meals — successfully eating the vomited contents in more than half of those instances.
- The discovery upends assumptions about marine mammal foraging, raising urgent questions about energy efficiency, behavioral innovation, and the boundaries of animal cognition.
- Scientists cannot yet confirm whether the tactic actually saves Bubbles more energy than conventional hunting, leaving the adaptive value of the behavior unresolved.
- The deepest uncertainty now is whether Bubbles stumbled onto this strategy alone or whether it is quietly spreading through the local dolphin population — a question that will require years of additional observation to answer.
Off the coast of Lady Elliot Island in Australia, a single bottlenose dolphin has quietly rewritten what scientists thought they knew about how cetaceans feed. Between 2021 and 2025, researchers documented a dolphin nicknamed Bubbles deliberately chasing fish until they vomited, then consuming the expelled meal — a behavior known as kleptoparasitism, never before recorded in whales, dolphins, or porpoises. Whether this represents one creature's solitary ingenuity or the early signs of a spreading cultural practice, it reminds us that nature's inventiveness rarely waits for our permission to surprise us.
Near Lady Elliot Island off Australia's coast, a bottlenose dolphin with distinctive fin notches and a V-shaped scar earned the nickname Bubbles from local eco-resort staff — and, eventually, a place in the scientific record. Between 2021 and 2025, researchers documented twenty encounters in which Bubbles pursued Bigeye Trevally, a reef fish, until they regurgitated their stomach contents. In eleven of those cases, he consumed the expelled food while the fish swam away unharmed. Photo-identification confirmed every sighting involved the same individual. The findings were published in a peer-reviewed study in September 2026.
What researchers witnessed appears to be the first documented case of kleptoparasitism — deliberate food theft from another animal — ever recorded in cetaceans. While the behavior is common across the animal kingdom, it has rarely been observed in aquatic species and almost never in marine mammals. Video footage showed Bubbles methodically scanning schools of trevally, isolating a single fish, and mirroring its movements during pursuit, accompanied by intense echolocation clicks and low-frequency sounds.
Critically, Bubbles never attempted to eat the trevally themselves — he waited exclusively for the regurgitated contents. Scientists suggest this could represent an energy-efficient alternative to conventional hunting, though without broader data on his overall foraging habits, they cannot yet confirm a net energy gain. The larger question — whether Bubbles invented this behavior independently or acquired it from others — remains open. No other dolphin near Lady Elliot Island has been observed using the same tactic, leaving Bubbles, for now, the only cetacean on record to feed this way.
Near Lady Elliot Island off Australia's coast, a bottlenose dolphin has developed an unusual way to eat. Researchers watching the waters between 2021 and 2025 documented something they had never seen before in dolphins: a single animal, identifiable by notches in his fin and a V-shaped scar on his right side, would chase fish until they vomited—then eat what came up. The dolphin, nicknamed Bubbles by staff at the local eco resort, repeated this sequence as many as ten times in half an hour.
Over five years, scientists recorded twenty separate encounters where Bubbles pursued Bigeye Trevally, a fish species common to the reef. In eleven of those instances, the fish regurgitated their meals, and Bubbles consumed the expelled food while the fish swam away. Photo-identification confirmed that every observation involved the same individual dolphin. The behavior was documented in a peer-reviewed study published in September 2026.
What makes this noteworthy is that it appears to be the first direct evidence of kleptoparasitism—the deliberate theft of food from another animal—ever recorded in cetaceans, the group that includes dolphins, porpoises, and whales. Kleptoparasitism itself is not rare in nature; many animal species steal food from one another. But it has been documented only rarely in aquatic species, and almost never in marine mammals. The researchers watched video footage showing Bubbles scanning schools of trevally, isolating a single fish, and mirroring its movements during pursuit. They also recorded intense echolocation clicks and low-frequency sounds as he chased individual prey.
The dolphin's method appears specialized and deliberate. He did not attempt to eat the trevally themselves—he waited for them to vomit, then consumed only the regurgitated contents. Scientists suggest this tactic could offer an energy-efficient alternative to hunting independently, since Bubbles expends effort to force the fish to disgorge food rather than catching and consuming the fish whole. However, researchers cautioned that without more data on his overall foraging behavior, they cannot yet confirm whether this strategy actually provides a net energy gain.
The open question now is whether Bubbles invented this behavior on his own or learned it from other dolphins in the area. Scientists have not yet observed other dolphins using the same tactic near Lady Elliot Island, and they do not know if the behavior exists elsewhere. More observations will be needed to determine whether this is a solitary innovation by one dolphin or a technique that might be spreading through the local population. For now, Bubbles remains the only documented cetacean known to hunt this way.
Citas Notables
Kleptoparasitism, the deliberate theft of food from other animals, is a widespread but usually facultative foraging tactic used by many taxa. It has rarely been documented in aquatic species, particularly marine mammals.— The peer-reviewed study documenting the behavior
Quieres la nota completa?
Lee el original en The National Desk ↗