A significant collision between a boat and a basking shark has been captured on video for the first time, raising concerns about the frequency of such incidents. Experts emphasize the need for increased monitoring and recommend that boats adhere to a code of conduct to protect these magnificent creatures.
Researchers have tagged a 7-meter female basking shark (Cetorhinus maximus) off the coast of Ireland with advanced sensors that record movement, depth, position, and video. The groundbreaking footage reveals the shark initially feeding at the surface before making alarming evasive maneuvers, ultimately leading to a collision with a boat. The shark then dives rapidly into the depths, only stabilizing once it reaches the seabed.
This incident, documented by experts, points to a potentially serious issue, as the tag attached to the shark automatically released about seven hours post-collision. Observations indicated that the shark did not return to its regular feeding behavior during this period. While the video showcased noticeable damage to the skin, including paint marks and abrasions, there were no immediate signs of bleeding or open wounds. The researchers remain uncertain about the shark’s recovery status.
Globally considered an endangered species, the basking shark is known to gather in large numbers off the coast of Ireland. Recently, a 28,000-hectare area in County Kerry was designated as the nation’s first national marine park. While some vessels adhere to a voluntary code limiting speed and proximity to these sharks, experts advocate for mandatory regulations and extensive studies to more accurately assess the impact of boat strikes on the species.
“Evidence of boat strikes is evident in sharks we’ve observed repeatedly, showcasing serious propeller markings,” said a researcher involved in the study. “This footage indicates that such incidents may be more common than previously thought.”
The researcher added, “I don’t intend to demonize fishing boats; accidents happen. However, there needs to be legally enforceable guidelines to ensure the safety of these animals.”
