5 unexplained creatures lurking beneath the sea… Subscribe to Dark5 ► http://bit.ly/dark5 Watch More Dark5: 5 Alien Creatures Left Behind on Earth ► https://www.youtube.com/watch?v=2MX1Y9-q5vk&index=10&list=PL5_Wlsif8uKta_8Fe8oyHJfmH_MpxRl6D 5 Most Mysterious Sounds Ever Recorded ► https://www.youtube.com/watch?v=-c7hCWwTlrY&index=8&list=PL5_Wlsif8uKta_8Fe8oyHJfmH_MpxRl6D 5 Extinct Animals That May Still Roam the Earth ► https://www.youtube.com/watch?v=HV6LFF2UmBU&list=PL5_Wlsif8uKta_8Fe8oyHJfmH_MpxRl6D&index=9 Presenting giant sea monsters and unknown creatures of the deep including a giant squid known as the USS Stein monster, the giant prehistoric crocodile creature seen by u-boat U-28, Trunko, the Bloop, and of course Megalodon.