Episodes

Special "Conshelf Adventure" 15 September 1966
1 "Sharks" 8 January 1968
2 "Savage World of the Coral Jungle" 6 March 1968
3 "Search in the Deep" 15 April 1968
4 "Whales" 15 November 1968
5 "The Unexpected Voyage of Pepito and Cristobal" 13 January 1969
6 "Sunken Treasure" 3 March 1969
7 "The Legend of Lake Titicaca" 24 April 1969
8 "The Desert Whales" 28 October 1969
9 "The Night of the Squid" 16 January 1970
10 "Return of the Sea Elephant" 8 February 1970
11 "Those Incredible Diving Machines" 10 March 1970
12 "The Water Planet" 28 March 1970
13 "Tragedy of the Red Salmon" 24 November 1970
14 "Lagoon of Lost Ships" 14 May 1971
15 "The Dragons of Galapagos" 24 February 1971
16 "Secrets of the Sunken Caves" 19 March 1971
17 "The Unsinkable Sea Otter" 26 September 1971
18 "The Forgotten Mermaids" 21 December 1971
19 "Octopus, Octopus" 24 January 1972
20 "A Sound of Dolphins" 25 February 1972
21 "500 Million Years Beneath the Sea" 11 January 1973
22 "The Smile of the Walrus" 5 November 1972
23 "Hippo!" 16 February 1973
24 "The Singing Whale" 12 March 1973
25 "South to Fire and Ice" 29 November 1973
26 "The Flight of Penguins" 21 January 1974
27 "Beneath the Frozen World" 3 March 1974
28 "Blizzard at Hope Bay" 22 March 1974
29 "Life at the End of the World" 14 November 1974
30 "Beavers of the North Country" 6 January 1975
31 "The Coral Divers of Corsica" 21 February 1975
32 "The Sleeping Sharks of Yucatan" 6 April 1975
33 "The Sea Birds of Isabela" 8 December 1975
34 "Mysteries of the Hidden Reefs" 5 April 1976
35 "The Fish That Swallowed Jonah" 23 May 1976
36 "The Incredible March of the Spiny Lobsters" 30 May 1976