Orcinus orca: "Flaccid" Fin Syndrome - Natural or Captive Phenomenon

• Main Author: Evans, Wende Alexandra
• Format: Other/Unknown Material
• Language: unknown
• Published: NSUWorks 1996
• Subjects: Marine Biology; Oceanography and Atmospheric Sciences and Meteorology; Orca; Orcinus orca
• Online Access: https://nsuworks.nova.edu/cnso_stucap/94

"Flaccid" Fin Syndrome occurs in mature male Orcinus orca. It is the bending of the dorsal fin towards the side of the body. Several factors are thought to cause this phenomenon. A questionnaire was distributed via electronic mail to the scientific community to gather opinions or the cause of FFS. The causative agents were categorized. Management considerations and changes were recommended with regards to captive holding. Captivity is not solely responsible for FFS. Other "wild" factors are also discussed in detail. A new name for the syndrome, Folded Fin Syndrome, is suggested and explained at the end of this report. Suggested management strategies for the combination of both free-living and captive orcas are discussed with recommendations for increased public awareness.