Species name: Hyphessobrycon Erythrostigma
Common names: Bleeding Heart Tetra
Family: Characidae
Subfamily: Incertae sedis
Order: Characiformes
Class: Actinopterygii
Maximum length: 2.4 in
Minimum tank size: 25 gallon

Species name: Carassius auratus
Common names: Common goldfish
Family: Cyprinidae
Order: Cypriniformes
Class: Actinopterygii (ray-finned fishes)
Maximum length: 12 in.
Minimum tank size: 25 gallons
Hardiness: Easy

Species name: Carassius auratus
Common names: Comet goldfish or kometto in Japan
Family: Cyprinidae
Order: Cypriniformes
Class: Actinopterygii (ray-finned fishes)
Maximum length: 12 in.
Minimum tank size: 25 gallons
Hardiness: Easy

Species name: Carassius auratus
Common names: Shubunkin (meaning “red brocade”), Poor Mans Koi or Chu-wen-chin in China
Family: Cyprinidae
Order: Cypriniformes
Class: Actinopterygii (ray-finned fishes)
Maximum length: 12 in.
Minimum tank size: 25 gallons

Species name: Carassius auratus
Common names: Japanese wakin goldfish or Wakin goldfish which means “Japanese Goldfish”.
Family: Cyprinidae
Order: Cypriniformes
Class: Actinopterygii
Maximum length: over 10 in.
Minimum tank size: 50 gallon. The wakin is ideally suited for ponds.