Apistogramma
Apistogramma study group

Apistogramma.com 

Nordiska Ciklidsällskapet 

Alf Stalsbergs homepage
Alf's homepage is well worth a visit. He has accumulated a tremendous amount of knowledge over the years,
and is one of the profiles in the hobby, at least in Scandinavia and Europe.
Make sure you read the fascinating stories from his collection trips throughout the Americas as well as Africa.

Forum Apistogramma.com
The best forum worldwide if you are interested in Apistogramma and other dwarf cichlids.

BARSCH - Die Bremer Aquarienrunde für Südamerikanische-Cichliden und Harnischwelse
A lot of great info about Apistogramma. It also lists most of the tradenames, and connects them to the right species

Tetra
Randy's Aquaria
Has some excellent information about breeding Tetras and other fish.
It is unfortunate that Randy as stopped updating his site. But there is some very good
information there still. Make sure you check out his fish tour articles ;)

Catfish
Planet catfish
"The catfish is a plenty good enough fish for anyone"

Corydoras  world
Simply the best corydoras site on the web. Well worth the 15£ you need to pay to become a memeber. We have met mr. Fuller a couple of times, and he really knows his corydoras stuff :)..

Danio
Danios and Devarios
Excellent Danio page