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SA fishers are being urged to report any possible sightings of a nationally listed marine pest, the Colonial Sea Squirt.
The exotic species (Didemnum spp.) has become a major pest overseas, including in New Zealand, and a suspected case has been reported in the waters of Twofold Bay, New South Wales.
Vic Neverauskas, PIRSA Biosecurity - Aquatic Pests, said while the pest is not currently present in South Australia, it is important that industry be on the alert to protect the biosecurity of our marine habitats.
“If it were to become established in South Australian waters, it would be a particular threat to our shellfish and finfish aquaculture,” Mr Neverauskas said.
“It overgrows many species, including sponges, anemones, limpets, oysters, mussels, scallops and barnacles.”
While similar in appearance to some native species, it should not be handled, removed or broken up in the sea as this increases the chance of it spreading. It is not considered toxic to human health.
It has a distinctive mustard or orange-yellow colour and forms large, spongy clumps, often wax-like in appearance.
People are urged to report any suspected sightings by:
- taking a photo, if possible
- recording an accurate note of the location, by GPS and landmarks
- then reporting it to FISHWATCH on 1800 065 522.
PIRSA Biosecurity is monitoring the NSW situation and is preparing a management strategy in the event of an outbreak in SA.
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