Scientists have successfully analyzed the genetic make-up of the offspring of pregnant coelacanth females for the first time. They found that the likelihood that the offspring is fathered by one single individual is very ...
Plants & Animals
Sep 19, 2013
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When it comes to sex among guppies, competition is high for those at the top of the game. To get around this predicament, a recent study has shown, guppies use trickery.
Plants & Animals
Sep 9, 2013
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University of East Anglia scientists have revealed how females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species.
Evolution
Aug 16, 2013
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(Phys.org) —It's not always easy to tell if a fish is male or female: they look more or less the same. But there are exceptions, such as guppies and, as with humans, guppy genitalia varies in size across the species.
Plants & Animals
Jun 3, 2013
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The London Zoo is urgently seeking a female mate for the last-known males of a critically endangered fish species.
Plants & Animals
May 10, 2013
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In an unusual mating strategy, hard-up males of a tiny, promiscuous fish species engage in homosexual acts in a bid to entice females to copulate with them, a study said Wednesday.
Plants & Animals
Dec 12, 2012
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Fishing hooks aren't the only hooks found in east-central Mexican waters. A new species of freshwater fish described by a North Carolina State University researcher has several interesting – and perhaps cringe-inducing ...
Plants & Animals
Sep 27, 2012
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More and more really tiny species are being discovered, like a 7.9mm fish in 2006 and a 7.7mm frog in 2011. There's increasing competition for the title of the 'world's smallest vertebrate', but exactly how do you determine ...
Plants & Animals
Sep 17, 2012
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A new species of fish with a penis on its head has been identified in the Mekong Delta in Vietnam, researchers said on Wednesday.
Plants & Animals
Aug 29, 2012
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(PhysOrg.com) -- Familiarity with your partner is usually thought to promote teamwork, but new research has found that on coral reefs at least, female cleaner fish are more cooperative with unfamiliar males than their ...
Plants & Animals
Feb 23, 2012
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