Orcas Ram Sunfish into Pieces in Coordinated 'Ram to Fragment' Behavior
Research published in Frontiers in Ethology highlights two instances of orcas in the Gulf of California, Mexico, ramming sharp-tail sunfish, leading to their explosion. This behavior, termed 'ram to fragment,' was initially noted in December 2021 by Erick Higuera from Orcas México. Subsequent footage recorded by Kathryn Ayres in 2024 and Héctor Franz in September 2025 validated this technique. The sunfish were already deceased prior to the ramming, suggesting a method of food processing rather than hunting. Orcas utilize spatial awareness and acoustic signals for coordination. This behavior may aid juveniles or serve as a form of play. The findings emphasize the intricacy of orca social structures and highlight the necessity for additional research. In response to rising tourism threats, Mexico's environment ministry intends to regulate interactions with orcas.
Key facts
- Study published in Frontiers in Ethology documents two incidents of orcas ramming sharp-tail sunfish into pieces.
- Behavior called 'ram to fragment' observed in Mexico's Gulf of California.
- First observed by Erick Higuera in December 2021.
- Higher-quality footage captured by Kathryn Ayres in 2024 and Héctor Franz in September 2025.
- Sunfish already dead before ramming; behavior is food processing, not hunting.
- One orca stabilizes sunfish while another rams headfirst at high speed.
- Juvenile orca ate smaller fragments in 2024 incident; adults ate from intact body.
- Behavior may benefit juveniles by breaking tough skin into manageable pieces.
- Could also be a form of play or social bonding.
- Research enabled by partnership between scientists, eco-tour operators, and citizen scientists.
- Mexico's environment ministry released plan to regulate swimming with orcas.
Entities
Artists
- Kathryn Ayres
- Erick Higuera
- Héctor Franz
- Michael McGowen
Institutions
- Beneath the Waves
- Orcas México
- Smithsonian's National Museum of Natural History
- Smithsonian magazine
- Frontiers in Ethology
- Scientific American
- CNN
Locations
- Mexico
- Gulf of California
- Antarctica
- British Columbia
- Patagonia
- Strait of Gibraltar