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Dorsal Fin Collapse
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Conclusion
The Dorsal Fin
- The dorsal fin is one of the three fins found on the orca alongside the fluke and the pectoral fins.
- The dorsal fin is positioned on the top of the orca and functions as a thermo-regulator, as well as stabilising the animal during swimming, preventing 'roll'.
- The dorsal fin is constructed from fibrous connective tissue called collagen.
- The dorsal fin can be used to identify gender in killer whales, with the dorsal fin of a male standing up to six feet tall in a triangular form, dwarfing the fin of the female that is half the size and sickle-shaped.
- Like the human fingerprint the dorsal fin is unique to each animal and assists scientists in identifying individuals in a pod.
Dorsal Fin Collapse
As with other characteristics, the dorsal of the orca differs amongst pods around the world.
- Dorsal fin collapse, also referred to as flaccid fin syndrome and folded fin syndrome, is the bending of the dorsal fin towards one side of the body.
- Some have argued that ‘flaccid’ fin syndrome is an inappropriate description of the condition, as the fin remains rigid once folded in a leaning position as opposed to being floppy and flexible as the name insinuates.
- Despite extensive research, scientists have yet to reach a satisfactory conclusion for the cause of this phenomenon; however, various hypotheses have been suggested.
Dorsal Fin Collapse
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