A rescued ragged-tooth shark has been successfully released back into the wild after spending nearly a decade under human care in Cape Town.
The shark, known as Blue, had been housed at the Two Oceans Aquarium since 2018, after being rescued from illegal wildlife trafficking. Over the years, she became a central figure in conservation education, helping visitors better understand the importance of protecting marine ecosystems.
Now fully grown and deemed fit for release, Blue has been returned to the ocean waters off Struisbaai, where a natural population of ragged-tooth sharks already exists.
From rescue to release
When Blue first arrived at the aquarium, she weighed just 26.6 kilograms and measured 183 centimetres in length. After eight years of care, she has grown into a mature adult weighing over 200 kilograms and nearly three metres long.
The decision to release her followed extensive health monitoring. In preparation, she was moved to a temporary holding facility where she underwent medical assessments, including blood tests and physical examinations, to ensure she was capable of surviving in the wild.
Transported in a specialised, oxygenated chamber, Blue was carefully taken to Struisbaai. There, a trained team guided her into the ocean using a purpose-built stretcher, ensuring a safe and controlled reintroduction.
Observers reported that she quickly adapted to her surroundings, swimming confidently as she re-entered her natural habitat for the first time in years.
Tracking and conservation efforts continue
To support ongoing research, Blue has been fitted with two tracking devices. An external “spaghetti tag” allows anyone who encounters her to report key details such as location and date, while an internally implanted acoustic tag emits signals that can be detected by receivers along the coastline.
These tracking systems will enable researchers to monitor her movements and contribute valuable data to conservation efforts.
Ragged-tooth sharks, although widely distributed, are considered vulnerable due to their slow reproductive rates and preference for shallow coastal habitats, which expose them to fishing pressure and environmental disturbances.
Blue’s release follows a similar case last year involving another shark, highlighting a growing commitment to marine conservation initiatives in South Africa.
While her departure marks the end of her time in captivity, it also represents a new chapter — one that offers hope for the survival of her species in the wild.
Source: Two Oceans Aquarium
