Female convict cichlid fish turned into pessimists when separated from partners. This is an Inside Science story. (Inside Science) -- Being stuck with an unwanted romantic partner is enough to put a ...

In the world of freshwater fish, procreation is pretty much the same across nearly all species. After spawning, Mom and Dad either die or swim off, leaving the young to hatch and fend for themselves.

PARIS - The tiny Central American convict cichlid may only be a few centimetres long but it's a fish with a big heart. Researchers in France found that the tropical fish -- known to be a loyal and ...