Celebes Rainbowfish (Marosatherina ladigesi) 
 
Celebes Rainbowfish (Marosatherina ladigesi): A Graceful and Vibrant Addition
The Celebes Rainbowfish (Marosatherina ladigesi) is a striking freshwater fish known for its shimmering body, elongated fins, and active nature. Native to the streams and estuaries of Sulawesi, Indonesia, this species is a great choice for aquarists looking to add elegance and movement to their tank. Their peaceful temperament makes them ideal for community aquariums.
Tank Setup for Celebes Rainbowfish
Celebes Rainbowfish thrive in tanks of at least 80 liters, with plenty of open swimming space and densely planted areas. They prefer soft to slightly hard water with a temperature range of 22°C–28°C and a pH level between 7.0 and 8.0. A gentle water current mimics their natural habitat, and regular water changes help maintain their health and vibrant colors.
 
Diet and Feeding
As omnivores, Celebes Rainbowfish require a varied diet for optimal health. High-quality flakes and micro-pellets should form the base of their diet, while live or frozen foods like brine shrimp, daphnia, and bloodworms provide essential nutrients. A mix of plant-based foods such as spirulina flakes can also be offered to enhance their coloration.
Behaviour and Tank Mates
These peaceful schooling fish do best in groups of six or more, which encourages their natural behaviors and reduces stress. They are excellent tank mates for other non-aggressive species, such as Tetras, Rasboras, Corydoras, and smaller Rainbowfish species. Avoid housing them with large or aggressive fish that may outcompete them for food.
 
Breeding Celebes Rainbowfish
Breeding Celebes Rainbowfish is relatively simple in a well-maintained aquarium. They are egg scatterers, often laying eggs among fine-leaved plants or spawning mops. To increase fry survival rates, consider using a separate breeding tank. Once hatched, fry should be fed infusoria or powdered fry food until they are large enough to consume baby brine shrimp.
 
FAQs
How big do Celebes Rainbowfish grow?
They typically grow up to 6–8 cm in length.
Are they aggressive?
No, they are peaceful schooling fish and do well in community tanks.
What tank mates are suitable?
Great companions include Tetras, Rasboras, Corydoras, and other peaceful species. Avoid aggressive or fin-nipping fish.
What do they eat?
They thrive on a mix of flakes, micro-pellets, and live or frozen foods like brine shrimp and daphnia.
Are they beginner-friendly?
Yes! Their peaceful nature and relatively simple care make them great for both beginner and experienced aquarists.
 
Species Overview
Species: Marosatherina ladigesi
Common Name: Celebes Rainbowfish
Origin: Sulawesi, Indonesia
Diet: Omnivore
PH Range: 7.0–8.0
Temperature: 22°C–28°C
Max Size: Up to 8 cm
Tank Size: Minimum 80 liters