The neon tetra is a freshwater fish of the characin family of order Characiformes. The type species of its genus, it is native to blackwater and clearwater streams in the Amazon basin of South America.

But even though larger snails are generally safe, their young may not be. So keep in mind that small, young snails may be at risk to be eaten by Assassin Snails. In addition to eating snails, Assassin Snails may be interested in fish flakes, blood worms and other protein rich supplements.

A Ramshorn Snail is a common freshwater aquarium snail available these days. Sometimes hobbyists choose to purchase a Ramshorn Snail as a pet. Other hobbyists find Ramshorn Snails inadvertently making their way into tanks as pests. Ramshorn Snails can accidentally make its way into tanks attached to live plants as small snails or in egg clutches. Whether a Ramshorn Snail is considered a pet or pest depends on each individual hobbyist and the type of tank being kept.

The harlequin rasbora is a small fish in the family Cyprinidae. The species became an instant favorite among aquarists after its introduction in the early 1900s and is the best known and most widely kept species among the rasboras.

The black neon tetra is a freshwater fish of the characin family of order Characiformes. It is native to the Paraguay basin of southern Brazil. They are often found in the aquarium trade.