Cardinal tetras are famous for their glowing blue and bright red stripes that run across their bodies. People often mix them up with neon tetras, but cardinal tetras have a bright red line that goes ...

Want to start an aquarium but don’t want tricky fish to take care of? Small freshwater fish are perfect. They are colourful, ...

Meet the world’s biggest feeder guppy a jaw-dropping giant that steals the spotlight during this exciting feeding session.

Saltwater and freshwater fish tanks are enjoyable to have around the home. But is one better for beginner tank owners than the other?

Scientists have uncovered how changing ocean currents in South Georgia's fjords could affect the survival of young mackerel ...

The Mediterranean's first sanctuary for dolphins that have lived in captivity will open off Italy next year, as demand for re ...

Vanguard, a new subsea human habitat, will immerse researchers for weeks, allowing them to observe the ocean’s complexity and ...

Yes, 2025 was the year that we unexpectedly lost San Francisco’s favorite albino alligator, Claude. But it was also the year ...

Males deliver their sperm with a penis-like anal fin, which cannot be retracted. Well-endowed males are more likely to ...