Favourite??

[Crispii]

Tetra: Cardinal tetra (Paracheirodon axelrodi)
Barb: Cherry barb (Puntius titteya)
Rainbowfish: Kamaka rainbowfish (Melanotaenia kamaka)
Livebearer: Rainbow goodeid (Characodon lateralis)
Cichlid: Altum angelfish (Pterophyllum altum)
Catfish: C121 Corydoras (Corydoras sp. C121)
Pleco: Any of the cactus plecos (Pseudacanthicus sp.)
Oddball: Ornate bichir (Polypterus ornatipinnis)