Overview
The Pacific Blue Tang (Paracanthurus hepatus) is a saltwater fish belonging to the family Acanthuridae. It thrives at temperatures of 24–26 °C with a pH of 8.1–8.4, and requires a minimum tank volume of 380 litres. Known for its peaceful but territorial toward similar species; highly active, it is considered a intermediate-level species. Requires a very large tank with open swimming space; highly susceptible to ich (Cryptocaryon). Water changes of 25–30 % weekly, stable parameters, and appropriate tank mates are key to long-term success with this species.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Acanthuridae |
| Genus | Paracanthurus |
| Species | Paracanthurus hepatus |
| Water type | saltwater |
| Native range | Indo-West Pacific|South Africa|Chinese Exclusive Economic Zone|Kenyan Exclusive Economic Zone|Chagos Archipelago|Mauritian Exclusive Economic Zone|Mozambican Exclusive Economic Zone|Seychellois Exclusive Economic Zone |
Natural Habitat
Paracanthurus hepatus originates from Indo-West Pacific|South Africa|Chinese Exclusive Economic Zone|Kenyan Exclusive Economic Zone|Chagos Archipelago|Mauriti. It inhabits saltwater environments and is adapted to the water conditions found in its native range.
Appearance
Adults reach 20–25 cm in length. The body is saltwater and the species displays characteristic coloration suited to its environment.
Behavior
This species is described as a peaceful but territorial toward similar species; highly active. It does not school and can be kept individually or in small numbers. Activity level is high. Requires a very large tank with open swimming space; highly susceptible to ich (Cryptocaryon).
| Trait | Value |
|---|---|
| Temperament | peaceful but territorial toward similar species; highly active |
| Schooling | No |
| Activity level | high |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 24–26°C (75–79°F) | Use a reliable adjustable heater |
| pH | 8.1–8.4 | Avoid sudden swings |
| Hardness (GH) | 8–12 dKH (alkalinity) dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <5 ppm | Manage through regular partial water changes |
| Min. tank | 380L (100 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- The 'Dory' fish from Finding Nemo/Dory — populations surged in demand after the 2003 and 2016 films.
- The sharp 'scalpel' spine at the base of the tail is used in defence and can inflict a painful wound.
- Wild Pacific Blue Tangs are found across the Indo-Pacific from East Africa to Hawaii.
📋 Full Care Guide
Ready to set up a tank for your Pacific Blue Tang? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read Pacific Blue Tang Care Guide →Related Species
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.