Ningaloo Reef at ~300 km long is Australia's largest fringing coral reef ecosystem and is adjacent the semi arid North West Cape (MPRA 2005). The reef is protected by Ningaloo Marine Park, 34% of which is Sanctuary Zones (MPRA 2005). The areas unique ecological, geological and cultural heritage has resulted in it being nominated for World Heritage Listing and is driving increasing numbers of tourists to the region (MPRA 2005). Whale sharks provide the focus for a significant marine ecotourism industry worth tens of millions of dollars to the local economy. These animals that visit Ningaloo are primarily juvenile/adolescent males (Taylor 1994) that have come to feed on seasonally abundant krill (Wilson et al. 2003). The abundance of krill is correlated with the strength and duration of the Leeuwin Current (Wilson et al. 2003). This food only lasts for a few months after which the whale sharks leave Ningaloo to search for food pulses at other locations around Indonesia and further afield. They are known to aggregate where food such as fish spawn, crab larvae, anchovies, squid and copepods can be found (Jarman and Wilson 2004, Heyman et al 2001).