Fish

How do fish breathe?

Uncover the secrets of fish survival beneath the waves
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There’s a fish in Tasmania with hands instead of fins, and scientists are about to save it from extinction

Amid concerns about the risk of upcoming marine heatwaves, 25 critically endangered red handfish have been removed from the wild in a bid to save the species from extinction.
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Seahorse guide: what they are, where they live - and why they change colour

Neil Garrick-Maidment explains all you need to know about seahorses, from why the males get pregnant to why they change colour
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It’s a slimy, prehistoric parasite with the mouth of an alien. And two fearless photographers are obsessed with finding it

The sea lamprey is not a creature with mass appeal, yet there is something about this ancient and mysterious eel-like fish and its extraordinary life-cycle that fascinates photographers Sébastien Barrio and Aurore Barrio.
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10 cuttlefish facts you may not know

Learn all about the amazing colour-changing cuttlefish
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Why do seahorses look like horses?

Just why do seahorses look like horses? Helen Scales explains why their equine-looking head makes them stealthy ambush predators
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Do fish pee?

how do fish get rid of waste products? Do fish pee? We take a look at a fish's urinary system
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Do fish sleep?

Wondering if fish sleep? It's not a simple yes or no answer says Stuart Blackman after weighing up the evidence
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Weirdest fish: 12 of the strangest fish in the world

Our seas are brimming with strange and wonderful creatures. Meet 12 of the weirdest fish in the world, which sport everything from super-long noses to golfball heads
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Why do some fish have fat lips?

Just why do some fish have fat lips? Stuart Blackman takes a look at the evidence
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Why pufferfish are so poisonous and how they avoid poisoning themselves

Helen Scales takes a look at the highly poisonous pufferfish
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How an electric eel works: You wouldn't want to be on the receiving end of its high voltage charge

Did you know electric eels can produce a hefty shock of 600 volts if needed? Matt Doggett take a look at how and why electric eels produce electricity
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What's the fastest shark in the world?

Did you know the fastest shark in the world can reach speeds of 70km per hour? Pretty impressive...
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Bullhead fish: what they are, what they look like - and how males entice females by singing

Did you know bullhead fish can sing? Yes really if love's around ... Nick Baker takes an in-depth look at this fascinating fish
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Blue shark facts: size, diet and what they look like

Learn all about the beautiful blue shark
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Where and when to see leaping salmon in the UK

Get settled by the water's edge this autumn and marvel at Atlantic salmon bravely leaping homewards to reproduce.
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How do 'flying fish' fly?

Just how do 'flying fish' appear to soar through the air? Helen Scales explains
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What is a lamprey and where do they live?

Nick Bake explores the life of the lamprey
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