'The effects on aquatic ecosystems could be profound,' experts warn
The pacu fish is a very close relative to the pirahna
The male wraps himself around the female and 'squeezes' her until she lays about 170,000 eggs
The body's first line of defence against harmful chemicals is being hampered by toxins such as DDT, PCBs and flame retardants found in fish, study finds
Snapping shrimps are the loudest invertebrate in the sea but risk being silenced by the end of the century
'Some people thought it might be this bizarre, swimming mollusc. We decided to throw every possible analytical technique at it'
The video's authenticity is yet to be verified
Experts believe the strange creature is a frogfish, although they can't be sure until it's examined
The WWF said that as fish stocks decline, 'meeting the basic needs of a growing human population will become an even greater challenge'
Tiny pellets of plastic so small that more than 500 fit in a single egg cup are washing up on beaches in Britain - and posing a significant threat to marine wildlife.
They will vie to be named the country's finest at the National Fish & Chip Awards 2016
Nose-to-tail eating saw offal and off-cuts go mainstream. But when it comes to fish, we've barely dipped a toe in the water, preferring fillets to cheeks, livers – and bones. Now, as Clare Hargreaves discovers, a growing number of chefs are keen to turn the tide
The incredible image was captured from the tiny island of Lovund in central Norway after temperatures suddenly dipped, freezing the water and trapping the fish
Arts Theatre, London
A seven-year-old girl lost part of her finger in the attack by a shoal of the meat-eating fish
An elderly doctor has appeared in court charged with child rape and indecent assault.