A discovery made on a beach on Bering Island has reignited scientific interest in the behavior of orcas. Researchers found two severed fins of Orcinus orca that showed bite marks from other individuals of the same species.
The discovery was analyzed in a study published in the scientific journal Marine Mammal Science, where specialists suggest the possibility that these whales might occasionally prey on each other.
The first fin was found in 2022 by Russian researcher Sergey Fomin. Two years later, a second fin appeared about two kilometers from the first discovery, suggesting that the phenomenon could be recurring in the area.
A discovery that raises questions about orca behavior
The images of the remains were analyzed by researcher Olga Filatova, a cetacean specialist from the University of Southern Denmark.
After examining the marks on the fins, the scientist concluded that the cuts matched bites from other orcas.
This type of evidence led researchers to consider whether the case could be deemed cannibalism, a behavior that occurs when an animal consumes another individual of its own species.
However, some scientists caution that there is still insufficient evidence to confirm this behavior definitively.
Different types of orcas and hunting strategies
The analysis also revealed that different groups of orcas with varied diets and very different behaviors coexist in the region.
On one hand, there are resident populations that primarily feed on fish. These groups maintain stable family structures and tend to stay together throughout their lives.
On the other hand, the area also hosts the so-called Bigg’s orcas, scientifically classified as Orcinus orca rectipinnus. These orcas are specialized predators that hunt larger animals, such as seals, sea lions, sharks, and even other whales.
Due to these differences, some researchers consider it possible that the hunting groups may have attacked the resident orcas, which they might simply perceive as prey.
Orcas and marine ecosystems: key ocean predators
Orcas occupy the top of the food chain in numerous marine ecosystems around the world. As apex predators, they regulate populations of fish, marine mammals, and other ocean animals, contributing to the balance of ecosystems.
Moreover, their complex social organization and their capacity for cultural learning make them one of the most intelligent species in the ocean.
These whales live in stable family groups that pass down hunting techniques and feeding habits across generations.
For this reason, studying their behavior is key to understanding the ecological dynamics of the oceans and the evolutionary processes within the species.
Why are they called “killer whales”?
The popular name “killer whale” has a historical rather than scientific origin. Ancient sailors observed that orcas could hunt animals much larger than themselves, including whales. For this reason, they began to describe them as “whale killers,” an expression that eventually transformed into “killer whale.”
However, this term can be misleading. Although they are very efficient predators, orcas play a fundamental role in the balance of marine ecosystems.
Scientists point out that the hunting behaviors among different groups do not stem from indiscriminate aggression but from complex ecological strategies developed over millions of years of evolution.
Therefore, rather than being violent animals, orcas are considered key species for the health of the oceans and for the natural functioning of marine food chains.
