19-Nov-2020 Theme: 'Mollusca'

(1) Which of the following is not a mollusc?: (a) Garden snail (b) Oyster (c) Cuttlefish (d) Octopus (e) Earthworm.

Answer: (e) Earthworm.

(2) What hard-shelled, edible mollusc – common in coastal south eastern Australia – shares a common name with a purple-flowering, invasive weed of south eastern Australia?

Answer: Periwinkle.

(3) What invasive marine bivalve mollusc was discovered infesting several marinas in Darwin Harbour in 1999, and was successfully eradicated?

Answer: Black striped mussel (Mytilopsis sallei).

(4) What inhabitant of the Great Barrier Reef (and elsewhere) is the world’s largest living bivalve mollusc, growing to more than 200kg.

Answer: Giant clam (Tridacna species).

(5) Australia’s largest native land slug, Triboniophorus graeffi, is found along the coast in NSW and Queensland. It takes its common name from a distinctive marking. What is it commonly called?

Answer: Red triangle slug.

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