Rummy Nose Rasbora (Sawbwa resplendens)
Rummy Nose Rasboras are great fish for temperament and colour; however, they are recommended for the more experienced aquarist due to these fish needing specific water requirements. But apart from that, they are otherwise hardy and easy enough to look after.
Keeping these fish in the company of their own kind is essential for their welfare, and it would be more beneficial for them if you kept them in groups of 8 or more individuals. Since they are so small, you could keep a school of these fish in an aquarium as small as 40 litres; however, a larger aquarium of around 75 litres is recommended. It will be easier to maintain and will have plenty of room for decor.
You can keep these peaceful Rasboras in a community environment; however, make sure you choose their tank mates wisely as they are timid and slightly nervous due to their small size.
They have a friendly disposition with other fish, and you can house them with tankmates of similar size and behaviours. However, these Rummy Nose Rasboras will develop a distinct pecking order within their own kind, and dominant males can become quite obstinate and combative.
They fare better with a sexually balanced school of around four females to each male and kept in a species only tank. A planted tank with plenty of decors can help keep the peace by breaking up the males' line of sight.
This fish has a slender, streamlined body. The colouration completely differs between the sexes. The male's body is usually a silvery-blue colour, and their nose and the tips of their tails are an orangy-red colour.
The females tend to be a duller silver to light olive-brownish colour with transparent fins with a dark pigmentation spot by their anus. Being scaleless gives both sexes an even colouration.
|Scientific Name||Sawbwa resplendens|
|Other Names||Sawbwa Barb, Asian Rummynose, Naked Microrasbora, Burmese Rammy Nose|
|Aquarium Level||All Levels|
|Best kept as||Groups 8+|
|Lifespan||3 - 5 years|
|PH||6.0 - 8.0|
|GH||3 - 15|
|TDS||54 - 268|
|71 - 75℉|
21.7 - 23.9℃
Rummy Nose Rasboras are native to the Shan State of eastern Myanmar in Southeast Asia. They inhabit Inle Lake, an isolated mountain lake that is relatively shallow with naturally occurring floating islands around the margins. These islands are thick coverings of vegetation floating on the surface. They are made up of various plants' dense tangles, both dead and living, which provide shelter and food for these little Rasboras.
These Rasboras also occur in the neighbouring watershed of the lake. During the wet seasons, the lake rises and fills an outflowing periodically stream known as the Balu Chaung. When the stream floods, it will spill over into other areas, often taking random fish species with it. During the dry seasons, the water subsides, leaving isolated ponds and pools with separate fish populations.
Other Rasboras of interest
What to feed the Rummy Nose Rasbora
Rummy Nose Rasboras will accept good-quality dried foods of a suitable size in the aquarium, such as flakes and granules. Still, it would be best to offer them regular meals of small live and frozen fare such as artemia, daphnia and suchlike as this will help develop their best condition and colour and encourage spawning behaviour.
Rummy Nose Rasboras will do best when offered food several times a day but only provide them with what they can consume in under 3 minutes at each feeding. If you only feed them once daily, deliver what they can eat in around 5 minutes.
How to Sex the Rummy Nose Rasbora
It is relatively simple to differentiate male from female Rummy Nose Rasboras. Males are brighter in colour than the females and have distinct red colours on their fins and nose, whereas females are duller and display a dark spot anterior to the anal fin.
How to Breed the Rummy Nose Rasbora
Breeding the Rummy Nose Rasbora can be pretty challenging. Like other Cyprinids, these Rasboras exhibit no parental care for the young. However, they differ somewhat in their spawning method. Rather than being open water egg scatterers, they deposit their eggs on filamentous algae or aquatic vegetation.
Keeping these fish in adult groups has been reported as the most successful method for breeding. Conditioning them with live foods will bring out the males colour and help females fill with eggs.
Your breeding tank should be heavily planted with artificial plants or fine-leaved plants. Marbles make an excellent substrate for these fish as this will help save any eggs that fall from the plants. Synthetic grass matting or spawning mops can also be used as these work very well.
Females only seem to breed at certain times. Temperatures in their native habitat dip down to around 57 to 64 degrees Fahrenheit; this seems to encourage spawning. Some aquarists figure providing a period of cool temperatures in February helps. These Rasboras fail to spawn if temperatures exceed 77 degrees Fahrenheit.
Dominant males may sometimes form temporary territories when spawning, and spawning typically occurs in the early morning hours after a strong ritual performance. The parents will then deposit eggs amongst the plants, repeatedly depositing several eggs at a time.
It would be best to keep the parents fed during spawning; otherwise, they will consume the eggs and possibly the fry.
When the fry hatch, they are tiny and will survive off their yolk sac for approximately 24 hours. After that, they will become free-swimming, and you will be able to feed them with infusoria and rotifers and other liquid fry foods several times a day. A week later, they will be big enough to accept crushed flake food or newly hatched brine shrimp.