30x Lacustris Rainbow 4-5cm

30 x Lacustris Rainbow

Lacustris rainbowfish, more commonly known as Turquoise Rainbowfish, are a staple species in the rainbowfish hobby-and for good reason. These fish are native to the pristine waters of Papua New Guinea and are widely celebrated for their naturally vibrant blue coloration, which rivals even the most selectively bred ornamental fish. A school of these shimmering fish will inject movement and colour into any planted aquarium, and their hardy nature makes them perfect for aquarists of all experience levels.

Juvenile lacustris rainbows might appear washed out at first glance, but with proper care and maturity, they develop a dazzling sea-blue sheen that stretches from head to tail. Their colour gradient transitions from a light turquoise at the front to a deeper, bolder blue at the rear, which is split by a near-black horizontal stripe running along the body. Under high-quality aquarium lighting, their scales glimmer, creating a hypnotic, metallic effect that looks particularly striking against green plant backdrops and darker substrates. In a large school, the effect is even more pronounced. This pack of 30 will transform any tank into a moving canvas of blue light.

Breeding lacustris rainbows in the home aquarium is relatively straightforward. Once mature, females will lay eggs almost daily, which males will then fertilise. The use of spawning mops or fine-leafed plants is common, allowing aquarists to easily collect the adhesive eggs. Males tend to exhibit more vibrant colouration, especially during courtship displays, while females appear more subdued with a lighter blue. Although raising fry requires a commitment to frequent feeding with fine live foods, it's a rewarding challenge for aquarists looking to expand their breeding experience.

Tank Recommendations for your 30 x Lacustris Rainbow

As the lacustris rainbowfish can reach up to 12 cm and are incredibly active swimmers, it is best to keep a school of them in an aquarium with a minimum volume of 400 litres. This will comfortably house all 30 fish and leave room for additional tank mates.

They are plant-safe and will thrive in a well-planted aquarium with plenty of open swimming space. As they are primarily mid to top water dwellers, the choice of substrate is not critical, but sand or fine gravel is ideal for aesthetic purposes. They are also excellent jumpers, so a tight-fitting lid is essential. Being a tropical species, they are best kept at a temperature of 24-28 degrees Celsius.

Suitable Tank Buddies

The lacustris rainbowfish is incredibly peaceful, but due to their speed and active nature, they may outcompete slower or bottom-dwelling tank mates during feeding. They can, however, be kept in a wide range of community aquarium settings and with other rainbowfish species.

Usually Compatible

Other rainbow fish species, a range of tetra species such as lemon tetras, black widow tetras, and Congo tetra,s along with danio species as well.

Sometimes Compatible

Corydoras, Apistogramma, angelfish, and other smaller or potentially slow-moving species.

Rarely Compatible

Aggressive species that may prey on the Coen River rainbow fish. Any incredibly small species, such as shrimp, should be avoided as they may be eaten by the rainbow fish.

Feeding your 30 x Lacustris Rainbow

Lacustris rainbowfish will take to aquarium foods very easily. They will take a wide range of pellets, flakes, and frozen foods. By giving them a varied diet, it ensures that they have optimal nutrition. The ideal diet would be a good quality floating food, supplemented with frozen bloodworms or black worms, or even live foods like baby brine shrimp. Feeding any foods with natural colour enhancers would also be great, as this will really enhance the stunning hues.