Largescale foureyes
Introduction
The Largescale foureyes (Anableps anableps), commonly known as the four-eyed fish, is a unique species that captivates aquarists with its distinctive eye structure. Each of its eyes is divided into two parts, allowing it to simultaneously see above and below the water surface. This remarkable adaptation makes it a fascinating addition to brackish aquariums. However, due to its specific care requirements and large size, it is best suited for experienced fishkeepers who can provide the appropriate environment and attention.
Care and Environment
Proper care for the Largescale foureyes involves replicating its natural brackish habitat and accommodating its unique behaviors.
What is the minimum tank size required for a Largescale foureyes?
A minimum tank size of 473 liters (125 gallons) is recommended to provide ample swimming space and maintain water quality.
What are the ideal water parameters for this species?
Maintain a temperature between 24–28°C (75–82°F), a pH of 7.5–8.0, and water hardness of 5–25 dGH.
How should the tank be set up to accommodate their behavior?
Provide a shallow tank with a large surface area, as these fish are surface dwellers. Include areas where they can rest with their eyes above the water, such as sloping beaches or partially submerged driftwood. Ensure the tank is securely covered to prevent jumping.
Filtration should be robust to handle the significant waste produced by these fish. Regular water changes are essential to maintain water quality. Lighting should be moderate to mimic their natural coastal environment.
As carnivorous surface feeders, Largescale foureyes thrive on a diet of live insects, small crustaceans, and high-quality floating pellets. Feeding should occur at the water surface to align with their natural hunting behavior.
Origin and Habitat
Native to the coastal regions of northern South America and Trinidad, the Largescale foureyes inhabit estuaries and coastal mudflats where freshwater meets the ocean. These environments are characterized by varying salinity levels, which the fish can tolerate. They are often found in shallow waters with gentle currents, allowing them to utilize their unique vision to spot predators and prey both above and below the water surface.
Temperament and Compatibility
Largescale foureyes are social fish that exhibit schooling behavior in the wild. They are best kept in groups of at least six individuals to reduce stress and promote natural behaviors.
Are Largescale foureyes aggressive towards other fish?
They are generally peaceful but may prey on smaller fish that can fit into their mouths.
What tank mates are suitable for Largescale foureyes?
Compatible tank mates include other peaceful brackish water species such as archerfish, mollies, and scats. Avoid housing them with aggressive or fin-nipping species to prevent stress and injury.
Creating a harmonious tank community involves providing ample space and hiding spots to accommodate the needs of all inhabitants. Regular monitoring of interactions will help ensure a peaceful environment.
Interesting Facts
The Largescale foureyes' most notable feature is its divided eyes, allowing it to see both above and below the water surface simultaneously. This adaptation helps it spot aerial and aquatic predators and prey.
How do Largescale foureyes reproduce?
They are livebearers with unique reproductive anatomy. Males have a gonopodium that can only swing to one side, meaning they can only mate with females whose genital opening is on the corresponding side.
Can Largescale foureyes survive in freshwater?
While they can tolerate freshwater for short periods, they thrive in brackish conditions and require such an environment for long-term health.
These fish are also known for their jumping ability, so a secure tank lid is essential to prevent escapes.
Sources
All information in this article has been gathered from the following reputable sources: