The colossal squid truly deserves its name, growing to lengths of between 12-14m (39-46 feet) – about the size of a bus. It was first “discovered” in 1925 – but only its tentacles were found, within the belly of a sperm whale. The first complete specimen was found near the surface in 2003. In 2007, the largest known specimen (10m) was captured in the Antarctic waters of the Ross Sea, and is now on display in the national museum of New Zealand. It is thought that the squid is a slow-moving ambush predator, feeding on large fish and other squid after attracting them with bioluminescence. Frighteningly, Sperm whales have been observed with scars that are believed to have been caused by the swivelling hooks on a colossal squid’s tentacles.