logo
episode-header-image
Dec 2023
27m 22s

Tooth and Claw: Piranhas

Bbc World Service
About this episode

Adam Hart investigates a frenzied and voracious fish from South America – the piranha! Said to be able to strip their prey to the bone in mere minutes, there are plenty of gruesome tales about the bubbling bloodbaths that occur when shoals of these hardy fish feed in the freshwaters across South America - from up in Venezuela in the Orinoco River, to the Amazon and down to the Paraná River in Argentina. What role did former United States President Theodore Roosevelt have in creating the piranha’s fearsome reputation? And is this reputation misguided?

Adam hears what piranhas are really like, both in the wild and in captivity. He learns about how these fish hunt, the impact that humans are having on them and tries to establish if they really are as bloodthirsty as we’ve been led to believe.

Contributors:

Marcelo Ândrade is a professor at the Federal University of Maranhão in Brazil. He researches the environments that piranha live in and their behaviour, as well as plastic ingestion by piranhas.

Hannah Thomas is the aquarium team manager at Chester Zoo in the UK where they care for 40 red-bellied piranhas.

Presenter: Professor Adam Hart Producer: Jonathan Blackwell Editor: Holly Squire Production Coordinator: Jonathan Harris Studio Manager: Neva Missirian

(Photo: Red-Bellied Piranha, Credit: Ed Reschke via Getty Images)

Up next
Oct 6
The Life Scientific: Jane Goodall
The celebrated primatologist Jane Goodall died last week at the age of 91. In tribute, we’re re-sharing this interview from 2020, where she reflects on the years she spent living with the wild chimpanzees in Gombe in eastern Tanzania and why she believes the best way to bring abo ... Show More
26m 29s
Sep 29
The Life Scientific: Jacqueline McKinley
How much information can you extract from a burnt fragment of human bone?Quite a lot, it turns out - not only about the individual, but also their broader lives and communities; and these are the stories unearthed by Jacqueline McKinley, a Principal Osteoarchaeologist with Wessex ... Show More
26m 28s
Sep 22
The Life Scientific: Jonathan Shepherd
Surgeons often have to deal with the consequences of violent attacks - becoming all too familiar with patterns of public violence, and peaks around weekends, alcohol-infused events and occasions that bring together groups with conflicting ideals.Professor Jonathan Shepherd not on ... Show More
26m 29s
Recommended Episodes
Dec 2023
Assignment: Bolivia’s giant fish intruder
Some people said it was created by Peruvian scientists, that it gorged on the blood of farm animals, that it was a monster. Many myths have grown up in Bolivia around the Paiche, one of the world’s largest scaled freshwater fish which is native to Amazonian rivers of Brazil and P ... Show More
27m 45s
Sep 2022
Why are fish fish-shaped?
There are over 30,000 species of fish – that’s more than all the species of amphibians, reptiles, birds and mammals combined. But despite the sheer diversity of life on Earth, we still tend to think of all fish in roughly the same way: with an oblong scaley body, a tail and pairs ... Show More
32m 9s
Sep 2017
Spider Silk and Super Fly Senses
CrowdScience is uncovering the super-powers of spiders, flies and the most irritating mosquitos. Anand Jagatia meets spider specialist Jamie Mitchells at London Zoo to find out how spiders create such vast webs and speaks to researchers in Sweden about how they are trying and suc ... Show More
27m 11s
Mar 2022
How to make fishing nets less destructive
Fish have favourite colours and dolphins hate high pitched noises. In an effort to save rapidly dwindling global fish stocks, scientists are trying to figure out how to attract the right fish into nets, and keep protected species away. On the southern coast of England, we meet th ... Show More
24m 10s
Dec 2021
Wild Inside: Jungle Royalty - The Jaguar
Wild Inside embarks on something we hardly ever witness – a look inside some of nature’s most wondrous animals. Its a rare chance to delve deep into some enigmatic and very different wild animals – from a reptile, to a mammal to a fish – unravelling the intricate internal complex ... Show More
29m 8s
Jun 2023
The benefits and problems of eDNA
This week, we hear from the University of Florida’s Dr David Duffy. He heads up a team of researchers who are studying sea turtles. In order to track the animals and their diseases, the scientists devised a method of collecting fragments of DNA from tanks at the university’s turt ... Show More
30m 51s
Feb 2023
Australia’s Scary Spiders
Brian Cox and Robin Ince end their Australian science adventure with an episode all about spiders. They are joined by ecologists Dieter Hochuli and Mariella Herberstein and comedian Claire Hooper. They learn about the strange physiology of spiders, including skin shedding, weavin ... Show More
42m 27s
Jun 2022
Black Water - Australia Crocodile Attack
Australia has garnered a reputation over the years as home to some of the deadliest animals in the world. If you swim in the ocean you might encounter a golf-ball sized blue ring octopus with a venomous bite, or the severe sting of the box jellyfish, whose tentacles can stretch t ... Show More
26m 5s
Nov 2021
Salmon wars
Sockeye and Chinook salmon make one of the world's great animal migrations, swimming 900 miles from the Pacific Ocean up 6,500 feet into Idaho’s Sawtooth Mountains, where they spawn and die - but that journey may not happen much longer. In addition to the gauntlet of predators th ... Show More
27m 12s
Jan 2024
Are orcas OK?
Something strange started happening in early 2023 in the waters off south-western Europe, where the Mediterranean sea meets the Atlantic ocean. Orcas began slamming into the sides of fishing and sailing vessels. The killer whales then dived underneath to locate and destroy the ru ... Show More
23m 52s