From garden ponds filled with Koi Carp to the humble goldfish bowl (although goldfish need far more space to live healthily and happily) – Britain has long been a nation of fish lovers.
There are an estimated five million indoor aquariums in the UK according to the Pet Food Manufacturers’ Association (PFMA) - that’s around 10 per cent of all housholds.
That makes fish of all sapes and sizes the third most popular pet in the land, after cats and dogs and cats.
It’s a great hobby, particularly for youngsters, and watching fish slowly swim around their home is wonderfully relaxing.
There’s plenty of choice for well prepared and correctly set up home aquariums, with pet shops offering a huge range of finned friends.
The first decision to make is whether you are going to pick a freshwater or saltwater tank - saltwater is a little more demanding - before choosing your fish breeds.
It’s important to ensure that you get the right fish for your particular aquarium or your pets will not be happy and healthy.
If space (and money) is no object then there are some incredible huge tropical fish you can opt to put in your enormous tank.
Here are 10 of the biggest - and most colourful - tropical fish for freshwater aquariums.
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1. Jack Dempsey
Originally from Central American countries like Mexico and Honduras, the Jack Dempsey Fish is named after a famous 1920s boxer thanks to its fearsome face and aggressive nature. Best kept alone in a tank, it's also important to provide them with somewhere to hide away - all 10 inches of them. | Canva/Getty Images
2. Oscar
Oscars can reach 12–14 inches in length and are quite remarkable animals - they are intelligent and interactive fish, able to recognise their owners and display unique personalities. These fishy monsters are best kept in large tanks with strong filtration due to their delightfully messy feeding habits. | Canva/Getty Images
3. Silver Arowana
Growing up to three feet, the ,mighty Arowanas are powerful surface-dwelling predators. Known for their metallic sheen and jumping ability, they require massive tanks, secure lids, and are best kept solo or with strong tankmates - these fish are proper carnivores. Although they need a large aquarium, they'll only occupy the top couple of feet. | Canva/Getty Images
4. Peacock Bass
The Peacock Bass is a fish for serious aquariasts only - needing at least a 150 gallon tank. A predatory species, if they get peckish they'll eat pretty much anything put in front of them, including other Peacock Bass. | Canva/Getty Images