Overview
The Lined Seahorse (Hippocampus erectus) is a advanced saltwater species known for its variable (brown, yellow, orange, black) coloration. Captive-bred recommended. Mid.
Origin & Appearance
Origin: Western Atlantic.
Colors: Variable (Brown, Yellow, Orange, Black).
Body Shape: Seahorse (upright). Typical adult dimensions: 7.6 x 2.9 x 19.0.
Sexual Dimorphism: Moderate; males have brood pouch.
Tank & Water Requirements
| Min Tank Size | 30 gallons |
| Temperature | 72–77°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | low |
| Oxygen Demand | medium |
| Plant Safe | mostly |
| Aquarium Position | Mid |
Behavior & Activity
Vertical upright swimmer; dorsal fin flutters for propulsion; tail grips hitching posts; poor swimmer carried by currents
Speed: 10/100Aggression: 1/10diurnalSchooling (6+)
Breeding
Moderate; male carries eggs in pouch
Common Diseases
💊 Bacterial💊 vibrio💊 gas bubble disease💊 fragile
Expert Notes
Captive-bred recommended; needs slow flow