You see, goldfish waste contains toxins like ammonia that can burn gills and even damage the brain. In the wild, this isn't a problem. Freshwater ... you can't just buy a fish the same day you ...

Freshwater ornamental fish — like gold barbs — make ... They’re related to a large number of other popular aquarium species, including goldfish and danios. Gold barbs are actually a ...

Some aquarium buddies are much more interactive than you'd expect—they follow their owners around, beg for food, and even ...

From garden ponds filled with Koi Carp to the humble goldfish bowl – the UK ... So, here are 10 of the most colourful fish for tropical freshwater aquariums.

This story appears in the April 2017 issue of National Geographic magazine. Hundreds of millions of people worldwide would lack their prime source of protein without freshwater fish. Yet the lakes ...

From preventing air sickness to ensuring the fish survive with limited oxygen, here's how one local firm ensures the safe ...