Scientists in Australia have created a genetically edited cane toad that gets stuck in the tadpole stage and attacks the plague before it spreads.

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Scientists in Australia have created a genetically edited cane toad that gets stuck in the tadpole stage and attacks the plague before it spreads.

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Noel Budeguer,  Click Petróleo e Gás,  2026.

Australia has begun testing an unusual idea to combat one of the country’s most persistent biological invasions: creating tadpoles of the cane toad who have never seen adults. The goal is to cut the problem off at the source, before the animals grow, leave the water, and move into new areas, increasing the impact on native wildlife. The proposal is noteworthy because it shifts the focus of control. Instead of targeting adults who have already spread out, the action targets the point where the population begins, the spawning grounds.

The cane toad, a species Rhinella marina, it was introduced in Australia in 1935 and spread rapidly through northern regions. The species adapted quickly, encountered few natural barriers, and came to dominate environments where native animals cannot compete on an equal footing. Over time, the problem ceased to be isolated and became a constant threat to entire ecosystems. The adult stage is what allows the cane toad to move long distances and occupy new territories. The idea behind the project is to prevent this transition, keeping the animal confined to the aquatic environment and reducing the arrival of adults in the natural habitat. In practice, the plan attempts to halt the spread of the pest before it “jumps” out of the water. The technique uses CRISPR Cas9 to alter a point related to the hormonal control of metamorphosis. The target is the production of thyroxine, a hormone that triggers the transformation of the tadpole into an adult frog. Without this signaling, the animal remains in the aquatic phase and does not complete the cycle that would make it an even more aggressive terrestrial invader.