While a collapsed dorsal fin does occur in wild killer whales, it is uncommon However even among the survivors, health issues are abound Most captive orcas have a bent dorsal fin and the reasons why affect their welfare.
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Although dorsal fin collapse is not unique to captivity, it is far more common in confinement
In the wild, the condition varies from population to population.
Contrary to popular belief, the bending of dorsal fins in orcas has been observed in both wild and captive populations There’s still a lot of debate as to why this happens, but biologists think there are several reasons which cause this phenomenon. Dorsal fin collapse has been observed in 1% of wild orcas 100% of captive adult male orcas have collapsed dorsal fins.
It’s not entirely clear why. Learn about orca dorsal fin collapse in captivity vs The wild—causes, effects, and why it highlights animal welfare concerns in marine parks. What happened to tilikum’s dorsal fin
Unraveling the mystery the collapsed dorsal fin of the orca tilikum, and many other captive male orcas, isn’t a random occurrence
It’s primarily due to the unnatural environment of captivity, resulting in weakened connective tissue and altered swimming patterns. At least 160 orcas have died in captivity, even more if stillbirths are counted