The most well-known, and popular cold water fish variety is the Goldfish. These fish have been bred for over 1600 years, first in China and then later (starting about 500 years ago) in Japan. Today there are dozens
of different types. Even though they are different colours and have different body, tail and eye shapes, they are all the one species, Carassius auratus.
Rummynose Tetra originate from tropical and sub-tropical regions of South America typically from Rainforest rivers and streams. It is important to keep these fish in an aquarium that is close to their natural habitat. Tetra enjoy swimming around hiding behind live plants, stones and aquarium treated wood in an aquarium.