The Blue Planet team picked up every bit of plastic they came across while making the show

Tonight’s episode of Blue Planet was a particularly sad one. Alongside the usual awe-inspiring visuals, the key message was that essentially the coral reefs are dying, and we're all terrible people and it's our fault.

One scene that really gave viewers the feels was where a female fish looking for a place to lay her eggs toyed with a discarded plastic bottle.

https://twitter.com/BBCEarth/status/928985628980551680 https://twitter.com/ceeepr/status/929811090028089344 The BBC Earth Twitter account - which tweets along with each episode, and well worth following - shared this little factoid: https://twitter.com/BBCEarth/status/929810441613832193 The series reportedly involved 6,000 hours of underwater film - you couldn't really blame they did let the odd bottle float past while they got the perfect shot. But no, it seems they did the right thing.