The Splash Tetra (Copella arnoldi) is a unique slender-bodied tetra who earned its common name from its unusual breeding behaviors. They will jump from the water in the wild and lay their eggs on broad-leafed plants just about the water level. As such, they should be kept in a covered aquarium to keep them from leaping out of the aquarium and possibly to their demise.
Many tropical community aquariums are populated with tetras, rasboras and other similar schooling fish. Though these fish are rather small, their pleasant temperaments, the schooling behaviors they exhibit and a vast variety of colors and shapes make them popular in the hobby. They can grow anywhere from a few centimeters to a few inches, and can add movement to a freshwater fish tank. Most of these fish are fairly easy to care for and have similar water chemistry and care requirements.
Tetras are probably the the largest group of fish offered for community aquariums. They can be distinguished from other schooling community fish by the small adipose fin present between the dorsal fin and the tail. Tetras include small species such as the vibrant neon and cardinal tetras to much larger and more robust species like Buenos Aires Tetras and Congo Tetras.
Danios are commonly recommended as "starter fish" and dither fish. They are fast and active swimmers and they like a long tank to swim in. Danios have interesting markings and are generally hardy and peaceful.
Rasboras are actually small members of the carp family. These schooling fish can be very colorful and are popular for community tanks.
These fish prefer aquariums with plenty plants and ornamentation to explore, but also need plenty of open space to swim. They can be fed commercial flakes, granules and small pellets as a staple diet, with occasional feedings of meaty frozen or freeze dried treats such as bloodworms, plankton, mysis or brine shrimp. They prefer to be kept in groups of six or more to school and feel secure.