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Red Triangle Slug feeds on algae on a suburban fence.   //   Red Triangle Slug: Athoracophoridae: Triboniophorus graeffei. Length to 14cm - Australia's largest slug. Occurs in coastal rainforests and Eucalytpus woodland of eastern Australia from Mossman Queensland to central New South Wales; isolated pockets in Victoria. Grazes at night on surface algae on trunks of trees, pickets, etc leaving behind a characteristic trail of bare surface . Has a very sticky slime. Green and yellow forms are also known. Endemic to Australia. Common.   //Eric Lindgren//