One of the most common "starter" pets for families, the goldfish, may not be so harmless when released into the wild.

Researchers say released pet goldfish can grow, reproduce and alter shallow freshwater ecosystems once established in the ...

What do goldfish have to do with the global trade balance? That's a question that has Ken Fischer reeling. He sells rare goldfish. And goldfish — the live pet, not the snack food — are tucked in on ...

Goldfish are commonly purchased as pets or fishing bait, but they become an invasive species if released into local lakes. A ...

Goldfish are a favorite pet among both adults and children, but most pet goldfish are lucky to survive for just five years before kicking the bucket despite their 15-year life expectancy. But why is ...

Goldfish can fundamentally alter the ecosystem when they are released into lakes and ponds, according to research from the ...

Goldfish rarely receive much attention beyond the role of household pets. They sit quietly in tanks, circle around artificial ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Photos showing enormous goldfish caught in a harbor in Canada have been released by wildlife authorities, warning people ...