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Byron Shire
April 16, 2021

Invasive fish species found in Bogangar, Cudgen

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Male and female Tilapea (photo Qld DAFF).
Male and female Tilapea (photo Qld DAFF).

The Department of Primary Industries (DPI) is asking for public help to stop the spread of one of the world’s most invasive fish species, Tilapia, after they were recently found in in Bogangar Canal and Cudgen Lake, south of Kingscliff.

DPI aquatic biosecurity strategy leader Melissa Walker said community co-operation is urgently needed to control the spread the pest fish.

‘The highest risk for transporting Tilapia is from humans carrying live fish or eggs,’ Ms Walker said.

‘If people catch or find a Tilapia, it is vital that the fish is not returned to the water.

‘Our advice to anyone who catches or finds Tilapia is to humanely destroy and dispose of it appropriately.

‘In any case of uncertainty about identification, we recommend taking a good quality photo then calling the Aquatic Pest Hotline immediately for confirmation.’

Ms Walker said Tilapia have pale olive to silver-grey bodies, with a long continuous dorsal fin, and can grow to more than 36 centimetres and live up to 13 years.

‘The fish are particularly threatening because they are such successful breeders,’ Ms Walker said.d

Female Tilapea with eggs in mouth. Photo Qld DAFF
Female Tilapea with eggs in mouth. Photo Qld DAFF

‘Mothers produce up to 1200 eggs a year and protect their young fry in their mouths for up to 14 days before releasing them.

‘This technique, known as ‘mouth brooding’, ensures that even if the mother dies, any eggs in the mouth have the potential to survive.

‘Once established in a flowing river or creek, these fish are almost impossible to eradicate so it is important to stop the spread of tilapia now before it’s too late.’

Tilapia impact on native fish numbers by competing for habitat and food, behaving aggressively, disturbing aquatic vegetation and could potentially introduce disease and parasites.

DPI fisheries and biosecurity staff are working with local council to coordinate surveys of the surrounding areas to help inform potential management options for this invasive pest fish.

Sightings of Tilapia can be reported to DPI by phoning 02 4916 3877 (24 hour hotline) on the department’s website or by emailing [email protected]


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2 COMMENTS

  1. I have caught many of these in Brisbane and I have caught these in bogangar. In bogangar canal there are native fish Aussie bass. Lucknow this cause I have caught 2 of them at different sizes.WE MUST SAVE THESE FISH (Aussie bass).

  2. I check many parts of cabaritta lake at night with high powered LED headlamps and the lake is littered with them.
    They hide in the shallows at night trying to avaid larger predators, unfortunately l see more Tilapea than any other species.

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