From garden ponds filled with Koi Carp to the humble goldfish bowl (although, goldfish really need far more space to thrive) – the UK is a nation of fish lovers.
Around 10 per cent of British households own pet fish – making them the third most popular animal to welcome into our homes after cats and dogs.
There’s plenty of choice when it comes to adding fish to (well prepared and correctly set up) home aquariums, with pet shops offering a bewildering range of interesting finned friends.
One think you should be aware of is that while many of the most popular fish, such as the Neon Tetra, need a heated tank, others are more than happy to chill in a cold water aquarium (although you’ll still need a filtration system to keep them in tiptop fishy-shape).
Here are 10 species of fish perfect to populate an unheated aquarium.

9. Bristlenose Pleco
If you are looking for afish to rid your unheated aquarium of algae then the Bristlenose Plecos, or Bristlenose Catfish, is a great choice - they love munching on the green stuff. Originally from South America, they are peaceful and don't grow too large (like their close cousin the Common Pleco). They look exactly as the name would suggest! | Canva/Getty Images

10. Gold Barb
Tough and attractive, Gold Barbs are social, cool-water fish native to the Red River basin in southeast Asia. Their shimmering gold coloration brightens any tank, and they do best in small schools with plenty of swimming space. | Canva/Getty Images