The Mollusca (pronounced /mɵˈlʌskə/), common name molluscs or mollusks (pronounced /ˈmɒləsks/), are a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. Mollusca is the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. Molluscs are highly diverse, not only in size and in anatomical structure, but also in behaviour and in habitat. The phylum is typically divided into nine or ten taxonomic classes, of which two are entirely extinct. Cephalopod molluscs such as squid, cuttlefish and octopus are among the most neurologically advanced of all invertebrates – and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods (snails and slugs) are by far the most numerous molluscs in terms of classified species, and account for 80% of the total.

Simon Anderson (born 7 July 1954) is a surfboard designer and shaper, noted for creating the 3 fin Thruster surfboard, a surfboard design now used on most shortboards.

Anderson grew up in the North Beach area of Sydney, with three brothers.

Anderson's surfing skill stood out from his brothers, and in 1972 he was a surprise winner of the junior division at the Bells Beach Classic Easter competition. In that year he also started shaping, with Shane Stedman in the Sydney suburb (and surf-factory hotbed) of Brookvale, near his home.

When Simon was recruited by Shane Surfboards, he was given the job of shaping "pop-outs," as they were called. That essentially meant that after the foam blank came out of the mold, the outer skin had to be taken off and then the board was glassed. They were a mass produced 'affordable' surfboard, but Simon was able to gain a considerable amount of shaping experience in a short time. He now had two things going for him; he was a world class surfer and he shaped his own equipment.