Complex sentence: Research off the coast of Australia suggests the large creature is much easier to catch around the full moon and the week afterwards due to its prey moving to the surface layers, which in turn forces the marlin to hunt in a wider area.
Split into simpler sentences: Research off the coast of Australia suggests that the large creature is much easier to catch around the full moon and the week afterwards. This is due to its prey moving to the surface layers which in turn forces the marlin to hunt in a wider area.