I thought it was interesting how they highlighted the plight of the sea otter, its impact on the sea-urchin population, and the consequent effect that has had on the kale forest, and the fish that survive in its environs. The episode that highlighted the negative impact of our plastic pollution rightly generated headlines, so it was good to see a story where a change in human behaviour (ending hunting sea otters) has an evident and positive effect on the food chain.
Gender fluidity amongst Cuttlefish as well. Incredible footage.