More info
Datasheet
| Minimum Tank Size | 800 litres / 211.34 US gallons |
| Maximum Size | 14.0cm / 5.51inches |
| Reef Compatible | Reef safe with caution |
| Temperament | Mostly peaceful but might be aggressive towards similar species |
| Temperature | 22.2°C / 71.96°F - 25.6°C / 78.08°F |
| Specific Gravity | 1.020-1.025 |
| Carbonate Hardness | 8-12 |
| pH | 8.1-8.4 |
General Description
The Long Green Wrasse, scientifically known as Pseudojuloides elongatus, belongs to the Labridae family. These fish, commonly referred to as Pencil Wrasses, are known for their attractive appearance and usefulness in combating unwanted invertebrates in reef aquariums. Wrasses, in general, have varied needs and behaviors, so it is essential to understand the specific species before acquiring one.
Aquarium Suitability
Aquarists considering keeping the Long Green Wrasse should be experienced, well-prepared, and willing to provide extra care. These fish are delicate and have specific demands, making them challenging to maintain successfully. They require a well-established aquarium with a significant population of microorganisms like copepods and amphipods to ensure they have access to food sources. Additionally, providing a varied diet multiple times a day, including small crustaceans and zooplankton, is crucial for their health and longevity.
Care and Hardiness
The Long Green Wrasse is considered delicate and can be challenging to sustain due to its demanding dietary requirements. They are known to dig into sandy substrate at night for sleeping or when feeling threatened. These fish also have the ability to change gender from female to male, often forming pairs in captivity. During transportation and acclimatization, they are extremely sensitive and require careful handling.
Reef Suitability
With caution, the Long Green Wrasse is considered reef safe. Their ability to feed on a variety of invertebrates makes them beneficial additions to reef aquariums, but they may display aggression towards similar species, requiring monitoring and management of tank mates.
Aquarium Setup
To create a suitable habitat for the Long Green Wrasse, a tank size of at least 800 liters with a deep sandy substrate of at least 2 inches is recommended. Maintaining stable water conditions with a temperature range of 22.2-25.6°C, a pH of 8.1-8.4, a specific gravity of 1.020-1.025, and a carbonate hardness (KH) of 8-12 is crucial for their well-being.
Behaviour
These wrasses exhibit mostly peaceful behavior but can exhibit aggression towards similar species. They have a tendency to jump out of open aquariums, so a secure lid is necessary to prevent escape. Additionally, they may bury themselves in sandy substrate when threatened or during the night.
Feeding and Diet
The Long Green Wrasse requires a diet rich in small crustaceans such as krill, mysis, and artemia. They also benefit from consuming zooplankton like cyclops and various pods. Feeding should occur multiple times daily to meet their nutritional needs adequately.
Habitat and Distribution
Native to regions such as Australia, Japan, Indonesia, New Zealand, and the Central/West Pacific, these wrasses are typically found in reef environments where they can forage on a variety of prey, including zooplankton, crustaceans, and sea urchins. Their presence in the wild contributes to the ecosystem balance by controlling populations of undesirable invertebrates.