Brackish
Arius (Hexanematichthys) seemanni (Colombian Shark catfish)
Monodactylus argenteus (Mono / Malayan angel)

Eels (Spiny eels, true eels, etc)
Macrognathus circumcinctus (Banded spiny eel)
Macrognathus siamensis (Peacock spiny eel)
Mastacembelus armatus (Tyre Track eel)
Mastacembelus erythrotaenia (Fire eel)

Knifefish
Apteronotus albifrons (Black ghost knife)
Chitala blanci (Royal Clown knifefish)
Chitala chitala (Clown knifefish)
Eigenmannia virescens (Glass/Transparent knifefish)
Gymnotus sp. "Leopard" (similar to carapo)
Xenomystus nigri (African knife fish)

(Note: Chitala species were formerly known as Notopterus)

Piranha
Pygocentrus nattereri (Red belly) - juveniles available

Polypterids (bichirs)
Erpetoichthys calabaricus (Ropefish/Reedfish)
Polypterus lapradei
Polypterus senegalus (Senegal bichir)

Puffers
Carinotetraodon travancoricus (Dwarf puffer/Pygmy puffer)
Tetraodon biocellatus (Figure 8 puffer)

Snakeheads
Channa aurantimaculata (Cobra snakehead)
Channa sp. "Green Fins" (poss. punctata var?)
Channa pulchra - New import! As featured on PFK website

Stingrays (freshwater)
Potamotrygon motoro
New Stingrays arriving shortly!

Miscellaneous Oddball and Rare fish
African Tigerfish (Hydrocynus vittatus)
Anostomus anostomus
Ctenolucius hujeta (Hujeta Gar)
Ctenopoma acutirostre (Leopard bushfish)
Cyclocheilichthys janthochir (Red Bala Shark)
Datnioides/Coius microlepis (Siamese/Sumatran Tigerfish)
Distichodus sexfasciatus
Electrophorus electricus (Electric eel)
Exodon paradoxus (Bucktoothed tetra)
Gar, Spotted (Lepiosterus occulatus)
Gnathonemus petersii (Elephantnose)
Hoplias malabaricus (Wolf fish)
Leporellus vittatus (rarely seen)
Lungfish, African (Protopterus annectens)
Osteoglossum bicirrhosum (Silver arowana)
Osteoglossum ferreirai, variant aka "Blue Arowana" - as featured in Practical Fishkeeping.
Oxyeleotris marmorata (Marbled sleeper goby)
Puntius denisonii (Red Line Torpedo barb)