Invasive snail eggs spotted in Lower Seletar Reservoir

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Invasive snail eggs spotted in Lower Seletar Reservoir
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Amid the rocks, water and greenery at Lower Seletar Reservoir, the blobs of pink stood out. Not only did they catch the attention of Facebook user Elsa Xu on Oct 5, but they also set off alarm bells for her. The large clusters belong to an invasive snail species...

Several photos of the scene captured by Ms Elsa Xu show hundreds of bright-pink egg clusters speckled across the reservoir’s rocks and vegetation.Not only did they catch the attention of Facebook user Elsa Xu on Oct 5, but they also set off alarm bells for her.In her post on the Nature Society Singapore Facebook page on the same day, Ms Xu said she was taking a walk with her daughter along the reservoir when they stumbled across a “significant presence of golden apple snail eggs”.

Originally from South America, it arrived in South-east Asia through the aquarium trade and is believed to out-compete native apple snails throughout the region. The golden apple snail lays pink eggs in clusters of between hundreds and up to a thousand, which is one reason why native species of apple snails, which lay eggs only in the hundreds, are being crowded out.The snails’ bright pink eggs are often spotted on plants and structures emerging from the water surface, the PUB guide said.

One user expressed worry about the eggs potentially being toxic to humans and animals, and warned others to be careful around the eggs when they are with young children or pets.But some users put a more light-hearted spin on the situation. This is not the first time the species seems to have taken over Lower Seletar Reservoir - with widespread clusters of the invasive ‘mentaiko’ also spotted in 2021.

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