SYDNEY: A robot submarine able to hunt and kill the predatory crown-of-thorns starfish devastating the Great Barrier Reef was unveiled by Australian researchers on Friday.
Scientists at Queensland University of Technology (QUT) said the robot, named the RangerBot and developed with a grant from Google, would serve as a "robo reef protector" for the vast World Heritage site off Australia's northeastern coast.
The RangerBot has an eight-hour battery life and computer vision capabilities allowing it to monitor and map reef areas at scales not previously possible.
"RangerBot is the world's first underwater robotic system designed specifically for coral reef environments, using only robot-vision for real-time navigation, obstacle avoidance and complex science missions," said Matthew Dunbabin, the QUT professor who unveiled the submarine.
"This multi-function ocean drone can monitor a wide range of issues facing coral reefs including coral bleaching, water quality, pest species, pollution and siltation."
Software will also enable the bot to detect crown-of-thorns starfish, which eat coral, and "instigate an injection which is fatal" to the predators, he said, adding that the injection is harmless for other reef creatures.
The starfish have proliferated in recent times due to pollution and agricultural runoff.
The Great Barrier Reef, about the size of Japan or Italy, is reeling from two straight years of bleaching as sea temperatures rise because of climate change.
Experts have warned that the 2,300-kilometre (1,400-mile) long area could have suffered irreparable damage due to the combined effects of bleaching, damage from agricultural runoff and the impact of the crown-of-thorns starfish.
Australia unveils starfish-killing robot to protect Barrier Reef
Australia unveils starfish-killing robot to protect Barrier Reef
Closing Bell: Saudi main index closes in red at 10,847
RIYADH: Saudi Arabia’s Tadawul All Share Index dipped on Wednesday, losing 58.51 points, or 0.54 percent, to close at 10,847.93.
The total trading turnover of the benchmark index was SR3.78 billion ($1 billion), as 73 of the listed stocks advanced, while 187 retreated.
The MSCI Tadawul Index decreased, down 7.09 points or 0.48 percent, to close at 1,472.98.
The Kingdom’s parallel market Nomu lost 178.75 points, or 0.77 percent, to close at 22,916.83. This comes as 30 of the listed stocks advanced, while 37 retreated.
The best-performing stock was the Power and Water Utility Co. for Jubail and Yanbu, with its share price surging by 8.47 percent to SR31.24.
Other top performers included Saudi Paper Manufacturing Co., which saw its share price rise by 6.13 percent to SR53.70, and Jamjoom Pharmaceuticals Factory Co., which saw a 4.58 percent increase to SR137.
On the downside, the worst performer of the day was CHUBB Arabia Cooperative Insurance Co., whose share price fell by 5.14 percent to SR17.53.
Saudi Kayan Petrochemical Co. and Arabian Internet and Communications Services Co. also saw declines, with their shares dropping by 4.87 percent and 4.43 percent to SR4.88 and SR181.40, respectively.
On the announcement front, Saudi Kayan Petrochemical Co. announced its annual financial results for 2025, with sales dropping 3.06 percent year-on-year to SR8.45 billion. The company also recorded a net loss of SR893.86 million.
In a Tadawul statement, the company said the net loss and decline in annual sales were driven by a drop in average selling prices, despite higher sales volumes.
