Original air date: 29 October 2017
A more detailed look at it is below
The same information in a different presentation
| Start time | Theme, Contents | More detailed description (Filming location) |
|---|---|---|
| Until 7’40 | Introduction | 3b |
| Until 2’40 | Attenborough appears | Talking on and off camera |
| 2’40 | Intro | — |
| 3′-7’40 | Bottlenose dolphins | A pod rubbing through fronds seems to have medicinal properties (6’15-7’40) |
| 7’50-18’40 | Fish intelligence | |
| 7’50 | Coral reefs | |
| 8’45 | Tusk fish | Fish intelligence |
| 10’30-11’50 | Tool use | Breaking a shell by hammering it repeatedly against a rock |
| 12’10-18’35 | Bird life | Terns flying above the reef (Seychelles) |
| 13’40-18’03 | Giant trevallies | Fish attack birds from below, jump in the air if the birds don’t touch down on sea – also demands complex calculations |
| 15’35-15’55 | Aerial attacks | Repeated attacks, first attack at 13’50 (stationary bird) and 17’25-18’10 (aerial attack) |
| 18’40-20’30 | Weather | |
| 18’40 | Cloud formation | |
| 19′ | Weather and waves | |
| 20’30-34’10 | Seasonal seas | Slow motion and ends underwater |
| 21′ | Rays leaping | No-one knows why they leap. Feed on (zoo)plankton that rise from the depths at night |
| 21’40-23’20 | Glowing of the plankton | Rays swimming through swarms of plankton |
| 23’40 | False killer whales | Killer whales catch (up with) the dolphins, the hot pursuit suddenly stops (25’42) and they seem to be greeting each other |
| 27’25 | Kelp forests | Sea otters, sea urchins, sea cucumbers, and sea dragons |
| 28’30-34’05 | Giant wrasse | Mating depending on temperature |
| 31′-34’05 | sex change | Body size leads to transformation changing to male |
| 34’10-48′ | Arctic | x |
| 34’10 | Arctic | Gulf stream delivers warmth |
| 35’20 | Herring & killer whale | Fish hunting specialists – feeding frenzy (36’10-39’50) |
| 38’15-40′ | Humpbacks | Join the hunt |
| 40′ | Arctic ice retreating | 3b |
| 41’30-48′ | Walrus | Sticking together on land to fight off attacking polar bears |
| 42’30-44′ | Polar bear | Gets stabbed when attacking a walrus |
| 45′-45’45 | Walrus | On patch of ice |
| 48′-end | Into the blue | |
| 48′ | Into the blue | Technology |
| 50’35 | Into the blue | Surfing with dolphins |
Selected sequence
Fish intelligence ?
The tusk fish seems to know where to find the clams he wants. He goes to the edge of the reef and starts digging. He removes the rubbish piece by piece (top) until he finds what he wants (bottom).
Having found the clam he takes it back to his “kitchen” where he smashes it against the rocks; tool use (11’06-11’33).