Fishermen can’t believe what they spotted after 50 years: An elusive animal seen only once before
A unique Pacific shark has reappeared in Papua New Guinea after decades of mystery.
The sailback houndshark (Gogolia filewoodi), a species first described in 1973, has been rediscovered in Astrolabe Bay, Papua New Guinea, after more than half a century without scientific records. The first known encounter with this strange animal occurred in 1970, when a local fisherman caught a pregnant female with large eyes, a bulbous head, a short snout, and an elongated dorsal fin resembling a ship’s sail.
After that discovery, the species vanished from the scientific radar for over 50 years. However, researchers have now confirmed its reappearance through a study published in the Journal of Fish Biology, which documents the first verified records since the 1970s.
The rediscovery happened while a team was collecting data for Papua New Guinea’s National Plan of Action for Sharks and Rays. In March 2020, a local fisherman caught five females of the species at the mouth of the Gogol River, and two years later, the first-ever male specimen was documented.
Although the scientific community had lacked evidence for decades, local fishermen report that occasional specimens are still caught in their nets, especially between March and July and again from August to November. However, their meat is not highly valued, and their fins have little market worth. “Fishermen report that the meat isn’t highly prized and is often given away if there’s a surplus… and the fins are not of high quality for the shark fin trade,” the researchers note.
Scientists believe the sailback houndshark could be a micro-endemic species, meaning it is restricted to a very limited area, similar to the bamboo and epaulette sharks in the same region. Some experts even suggest it may have had a wider range in the past, between Indonesia and Papua New Guinea, but now only a residual population remains.
Threats and an uncertain future
The fragility of these species is a concern for marine biologists. “Micro-endemics are highly vulnerable to habitat disturbances,” explains Jack Sagumai, lead author of the study and member of WWF. “Small environmental changes or development activities in the area could significantly impact the species’ survival.” Major threats include the rise of swim bladder fishing for the Asian market, which could accidentally endanger these sharks.
Looking ahead, the research team plans to analyze the DNA of the specimens to better understand their biology, ecology, and population dynamics. “Further support is still needed to better understand the life history and ecology of this species,” Sagumai added, highlighting the importance of collaborating with artisanal and subsistence fisheries in poorly studied regions of the planet.
Get your game on! Whether you’re into NFL touchdowns, NBA buzzer-beaters, world-class soccer goals, or MLB home runs, our app has it all.
Dive into live coverage, expert insights, breaking news, exclusive videos, and more – plus, stay updated on the latest in current affairs and entertainment. Download now for all-access coverage, right at your fingertips – anytime, anywhere.