Complex sentence: In 1954, Marks made a significant collection of marine insects off Low Isles Reef of far North Queensland and discovered a tiny marine insect on the reef near Heron Island, where a UQ research station was being established.
Split into simpler sentences: In 1954, Marks made a significant collection of marine insects off Low Isles Reef of far North Queensland. Marks discovered a tiny marine insect on the reef near Heron Island, where a UQ research station was being established.