Fast Ferries Threaten Endangered Mediterranean Whales Despite Speed Recommendations
Shipping companies prioritize strict commercial schedules over voluntary speed limits, endangering protected cetacean populations.
1Conservation Area Collision Risks
The Pelagos sanctuary, a vital habitat in the north-western Mediterranean, hosts two-thirds of the region's fin whales and one-fifth of sperm whales. Researchers recently identified a physical injury on a sperm whale fluke, likely caused by a vessel strike. These collisions remain a primary human-induced cause of mortality for these endangered marine mammals.
2Voluntary Speed Recommendation Failure
In July 2023, the International Maritime Organization established a Particularly Sensitive Sea Area, recommending vessels over 300 tonnes maintain speeds between 10 and 13 knots. However, data shows ships spent over 280,000 hours traveling above 15 knots in 2025. This voluntary framework has proven largely ineffective at curbing high-speed transit through critical habitats.
3Commercial Pressure Over Safety
Captains from major operators like Grimaldi Group and Moby Lines report that companies have not implemented internal slow-steaming policies. Ferries carrying tourists operate at speeds up to 25 knots to maintain rigid commercial schedules. Industry experts note that reducing speeds would disrupt the current business model, potentially driving passengers toward alternative air travel options.
4Concentrated High-Speed Operations
Speeding behavior is highly concentrated among a few specific operators. In 2025, seven vessels—four from Baleària and three from Grimaldi—accounted for 70% of all hours spent traveling above 25 knots. Grimaldi’s cruise ferries, including the 250-meter-long Cruise Roma, consistently dominate the list of vessels maintaining high speeds within the protected sanctuary zone.
5Industry Perspectives on Compliance
Shipping companies cite operational trade-offs, such as the need to add more ships to maintain service reliability if speeds are reduced. Corsica Ferries and Baleària emphasize their participation in conservation research and monitoring programs. However, some operators argue that slower navigation can actually reduce a vessel's maneuverability when avoiding sudden cetacean sightings.
6Data Trends and Reductions
While high-speed transit remains prevalent, there was an 11% reduction in hours spent above 15 knots between 2022 and 2025. Time spent above 25 knots also decreased by approximately one-third. Analysts suggest these declines are likely driven by altered shipping routes rather than direct compliance with the voluntary speed recommendations established by international maritime authorities.
7The Call for Mandatory Regulation
Scientific experts, including the Tethys Research Institute, argue that voluntary measures are insufficient to protect marine life. They advocate for a transition to mandatory speed limits to create a level playing field for all shipping operators. A binding framework would ensure that conservation efforts do not rely solely on individual corporate decisions or goodwill.
8Underreported Collision Statistics
The International Whaling Commission recorded six incidents in the sanctuary since July 2023, including five near-misses and one confirmed collision. Experts believe these figures significantly underrepresent the true scale of the problem, as most ship strikes go unrecorded. The ongoing tension between maritime logistics and biodiversity protection remains a critical unresolved environmental challenge.