The fish species Salmo trutta, commonly referred to as the 'Sussex Tiger' due to its distinctive brownish-red scales, is alarmingly close to extinction. Reports from international sources like ITV News highlight concerns regarding its dwindling population after a specimen was discovered in Sussex, an area known for its rivers such as the Ouse and Adur. The fish, capable of reaching lengths of up to 140 centimeters and weights of 50 kilograms, is celebrated for its unusual beauty and strength, yet most specimens typically average between 30-60 centimeters and weigh around 1-2.5 kilograms.

Ecologists, including Dave Bangs, have raised the alarm about the potential for S. trutta to become extinct, linking it directly to the ongoing residential developments. According to "The Argus," plans to build nearly 1,100 new homes north of Lewes threaten the natural habitat of this unique fish species. This development poses severe risks as increasing urbanization continues to encroach on the areas where these fish thrive, further diminishing their population and habitat quality.

Activists dedicated to environmental protection stress the significance of preserving this extraordinary trout, as its existence is not only an asset to local biodiversity but also a testament to the ecological health of Sussex’s waterways. The situation highlights a critical conflict between development projects and conservation efforts, urging immediate action to prevent irreversible damage to this remarkable species and its habitat.