Among trips reflecting inspirational sequences in the series are a Sardine Run adventure in South Africa; whale sharks in Galapagos; walls, schools and critters in Lembeh Strait;  sperm whales with calves in Dominica; and the depths of Antarctica.

But we were particularly taken with the idea of witnessing the giant cuttlefish annual mating aggregation in South Australia, with an extended liveaboard expedition beginning on the Neptune Islands.

You’ll also go down in a great white shark cage, and dive (we hope) with seadragons, sea-lions and other marine life. The trip costs from £3435pp (two sharing) for nine nights’ full-board, nine days’ diving and transfers.