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As the Nektons explore a mysterious tunnel behind a huge undersea waterfall, strange creatures and strong currents surprise them at every turn. Everything is not as it seems.
Episodes
1Here Be Dragons 2Dark Orca 3A.I.M.Y. 4Digging Deeper 5Devil's Sea Mystery 6Lonesome Jim 7Captured 8The Test 9Fossil 10Colossal Squid 11Monster Hunter 12The Phantom Sub 13The Abyss Stares Back 14Junior Nektons 15Treasure of the Islanders 16Tunnel 17The Sunken Gallery 18Field of Giants 19The Proteus Factor 20Song of the Siren 21Bad Luck Fish 22Strange Migration 23Bloop 24The Twilight Zone 25Loki's Castle 26Tartaruga