Overview
The Jack Dempsey (Rocio octofasciata) is a intermediate freshwater species known for its dark brown-purple, blue-green spots coloration. Named after the boxer. Mid to Bottom.
Origin & Appearance
Origin: Central America.
Colors: Dark Brown-Purple, Blue-Green spots.
Body Shape: Moderately Compressed (oval-flat). Typical adult dimensions: 25.0 x 3.8 x 11.2.
Sexual Dimorphism: Subtle; males have more blue spangles, pointed fins.
Tank & Water Requirements
| Min Tank Size | 53 gallons |
| Temperature | 72–86°F |
| pH Range | 6.5–7.5 |
| Water Hardness (GH) | 5-15 |
| Bioload | high |
| Oxygen Demand | medium |
| Plant Safe | no |
| Aquarium Position | Mid to Bottom |
Behavior & Activity
Moderate mid-level swimmer; territorial patrol with deliberate movement; charges at intruders; digs in substrate
Speed: 42/100Aggression: 7/10diurnalSchooling (6+)
Breeding
Moderate; substrate spawner
Common Diseases
💊 Ich💊 HITH
Expert Notes
Named after the boxer; aggressive