30 minSeason 4 • Episode 6
LatestThe Siamese Fighting Fish is so aggressive it will fight its own reflection until it is exhausted. Recent research shows that the fighting behaviour varies and depends on the personality of the fish! Male kangaroos were once pitted against humans in the boxing ring – the most impressive male kangaroos are solid blocks of muscle with a kick that can kill. Why do they fight and what skills must a winner have?
Sir David shines the spotlight on some of nature’s evolutionary anomalies and reveals how these curious animals continue to baffle and fascinate.
Writing
Attenborough's scripts make complex biology feel like juicy gossip.
Production
Tight 30-min episodes — no filler, just pure evolutionary drama.
Acting
Sir David's genuine delight at blobfish is unmatched.
Trivia, insights & behind the scenes
This series was one of Attenborough's first fully HD productions, letting him finally show off those weird little details he'd been dying to share for decades.
The show's title is a sly wink — Attenborough himself was knighted partly for making 'curiosities' mainstream, turning oddball species into beloved icons.
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