While a collapsed dorsal fin does occur in wild killer whales, it is uncommon Most captive orcas have a bent dorsal fin and the reasons why affect their welfare. 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. The collapsed dorsal fin observed in many captive killer whales is a powerful indicator of compromised health and welfare, directly linked to the unnatural conditions of captivity. 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. 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. The captive environment bears little resemblance to their wild habitat, and the social groups that the orcas are put into are foreign to those found in the wild Dorsal fin collapse happens to 1% of wild orcas
The most commonly accepted explanation for the collapsed dorsal fin is that when killer whales are put into captivity, they become depressed and their fins collapse as a result.
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