Rare Tope Shark Spotted Off Coast of Sussex in UK Marine Life Survey

In a groundbreaking study conducted by researchers from the University of Sussex, it was revealed that the waters off the coast of Sussex, U.K. are teeming with a diverse array of marine life. The three-year survey utilized innovative methods to document the rich biodiversity lurking beneath the surface.

Unveiling the Rare Visitors

The researchers utilized two distinct survey methods to capture the elusive creatures inhabiting the Sussex coast. The first method involved deploying baited remote underwater video (BRUV) cameras to attract and film the marine life. The second technique centered on the analysis of environmental DNA (eDNA) samples collected from the water. This comprehensive approach yielded remarkable results, uncovering 81 different species, including eels, sharks, and various fish species.

Encounters with Rare Species

Among the astonishing discoveries was the sighting of a tope shark, a rare species for the area, captured by one of the underwater cameras. The tope shark, scientifically known as Galeorhinus galeus, boasts impressive "blade-like teeth" and can grow up to 6 feet in length, weighing around 100 pounds. Despite its formidable appearance, this shark is deemed harmless to humans and is frequently sought after as a food source.

Reviving the Mysterious European Eel

Fascinatingly, the study also detected the environmental DNA of the critically endangered European eel, Anguilla anguilla, although this species was not visually captured by the cameras. The revelation of this elusive species has emphasized the importance of the study in shedding light on the hidden inhabitants of the Sussex coast. Study co-author Alice Clark expressed her astonishment at the diverse range of species discovered in the region.

The Power of Surveillance Techniques

Upon comparing the survey methods, the researchers concluded that while BRUV surveys are more cost-effective, eDNA analysis proved to be significantly more effective in detecting species, identifying almost three times more than the former method. They recommended the simultaneous use of both techniques to obtain a comprehensive understanding of the marine biodiversity in the area.

Implications for the Future

The insights garnered through this survey have provided a crucial baseline for monitoring marine vertebrate communities in Sussex Bay, serving as a valuable resource for future biodiversity monitoring efforts. The research team, comprising Alice Clark, Sophie Atkinson, Valentina Scarponi, Tim Cane, Nathan Geraldi, Ian Hendy, J. Reuben Shipway, and Mika Peck, has made significant strides in unraveling the mysteries of the Sussex coast.