BBC Pictures/Twitter/@loulabxlleBlue Planet 2 was almost too much for many of us
There was a big reaction online to last night's opening episode of Blue Planet 2- mostly from viewers who found themselves unexpectedly crying an ocean of tears at the plight of walruses and dolphins.
The new seven-part series opened with an episode about life under water from the tropical coral reefs to the Arctic - and it was an intense watch for the 10m of us who tuned in.
First up, there were the dolphins, riding waves with the carefree abandon of Patrick Swayze and Keanu Reeves in Point Break.
But the really special dolphin moment arrived when we came across predatory false killer whales searching for dolphins off the coast of New Zealand. Naturally, we came to expect the worst: that the dolphins were about to become a snack.
But then came the twist: they're MATES. Or, at the very least, the equivalent of those colleagues that you put up with in order to survive the working day.
We saw that when the whales found them, they teamed up with the dolphins to form a badass army to take advantage of the bounty of the seas.
The socio-political lesson of the whale-dolphin alliance was not lost on viewers.
Then we came to the walruses living at the Arctic. Man, those walruses broke our hearts.
We learned about how nurturing walrus mums form a profound lifelong bond with their children.
However, the most devastating moment was when we saw mother walruses struggling to find intact ice floes for their new calves to rest on. Rising temperatures made the task all the harder.
So when we saw footage of a mum walrus cradling her calf underwater while she tried to find a floe, it was enough to set off the floods of tears for most viewers.
But some viewers responded to an even more emotional dilemma: choosing between baby walruses and baby polar bears.
But amid all the high emotion, there was still room for funny gags and memes.
There was a mix of horror and glee at the introduction of the kobudai (Asian sheepshead wrasse), a huge fish with a bloated head, in waters off the coast of Japan.
The males of the species are particularly charming-looking.
But the best part was yet to come.
After one kobudai tried unsuccessfully to mate with a large female at the start of a summer, the female disappeared into a cave. When she emerged, she'd change gender, becoming a new male to challenge the older male for dominance.
And lastly, viewers were feeling emotional about Blue Planet's narrator, Sir David Attenborough.
And finally, one Twitter user has handily summed up the first episode in marine emoji:
