The more I got into freshwater fish and plants, the more species I learned of that would make really interesting and beautiful tank inhabitants. Here are some of the fish I haven’t yet had the opportunity to care for, along with some of their basic requirements. In no particular order:
Furcata Rainbow
aka Forktail Blue Eye Rainbow, (Pseudomugil furcatus )
reach around 2″
prefer tanks densely planted with shady areas
pH 6.0 to 8.0, temp 75 to 81 degrees Fahrenheit
best kept in large groups
peaceful
Spotted Blue-Eye Rainbow
aka Gertrude’s Blue-Eye, (Pseudomugil gertrudae )

Gertrude’s Blue-Eye Rainbow, male
reach about 1.5″
like densely planted tanks with driftwood, floating plants to break up light
wide pH range, prefer around 6.0 to 7.0
temperature between 73 and 86 degree Fahrenheit
best kept in groups
Peacock Gudgeon
aka Peacock Goby, (Tateurndina ocellicauda )

Male Peacock Gudgeon
reach about 2.5″
15+ gallon tank
temperature 72 to 77 degrees Fahrenheit
pH of 6.5 to 7.8
prefer tanks with lots of cover
peaceful
Boesmani Rainbow
aka Boeseman’s Rainbowfish, (Melanotaenia boesemani )

Boesmani Rainbows
reach about 3″
30+ gallon tank
temperature of 72 to 77 degrees Fahrenheit
pH 6.5 to 8.0
prefer planted tanks with lots of swimming room
like being in groups
peaceful
Rainbow Darter
(Etheostoma caeruleum )

Rainbow Darter
reach about 2.5″
very sensitive to water conditions
North-American native fish!
prefer rocky substrates and water with a decent current
temperature 60 to 75 degrees Fahrenheit
African Butterflyfish
(Pantodon buchholzi )
reach around 4″
need 30″ gallons
75 to 86 degrees Fahrenheit
pH close to 7.0
floats just below water’s surface
aggressive