Phoenix Rasbora — Boraras merah: Habitat and Care

Boraras merah is the accepted name for Phoenix Rasbora, formerly Rasbora merah. The useful representative pattern is a large longitudinal oval dark blotch on the front part of the flank, with a narrow, sometimes faint or interrupted marking continuing towards the tail. Much of the body is translucent; red-orange colour is concentrated around the markings and fins.

Compare it with the stronger elongated stripe and more extensive red of B. brigittae, but do not turn that contrast into an infallible colour test. Individuals and trade groups vary. The primary comparative account retains merah as a distinct species and describes its particular blotch-and-trailing-line pattern. Use the scientific identification and supplier information alongside the whole fish, especially if an intended breeding group includes unusually striped specimens.

Plan a same-species group of at least 10–12. The fish is small, around 1.5–2 cm, but a few individuals in a tiny container offer little scope for normal social spacing. A 45 × 30 cm base is a published small-group starting point; around 60 cm length provides more room for plant screens, feeding and the keeper’s hands.

Some fish will move close together, while others pause by vegetation. Look for access and body condition across the group rather than expecting an unbroken formation. A fuller female is not necessarily overfed or unwell. Keep a lid, cover equipment gaps and check that an intake guard does not create a narrow recess from which a small fish cannot return.

A practical routine plan is 23–26°C, pH about 5–6.5 and 1–5°dGH. The soft-water requirement is important here; the broader advice for ordinary community rasboras is not a suitable replacement. Check the aquarium and replacement supply before introducing the group, and use its recent keeping conditions to guide a gradual transition.

At low buffering, consistency is more useful than repeatedly correcting a reading. Use mature filtration, modest circulation and a clear moving surface. Ammonia and nitrite should remain undetectable. Check how replacement water behaves after preparation and temperature matching rather than using leaves to compensate for an unsuitable water supply. Maintain the system through regular small tasks instead of waiting for a visible problem.

Place a very small ration in the occupied water and watch individual mouths. Correctly sized complete micro-food should be taken and swallowed; persistent spitting or particles falling untouched signal a size or acceptance problem. A settled group can still lose condition if the visible meal is suitable only for larger companions.

Offer variety through appropriately small live and frozen items, selecting the size rather than relying on the food’s name. Newly hatched Artemia can be useful where accepted; not every adult crustacean fits a miniature mouth. Share portions across the plant edge, then remove persistent leftovers. Feeding is successful when the quieter fish gains access too, not when the first confident male becomes round.

A quiet species aquarium gives the clearest view of this fish and makes a soft-water feeding routine simpler. If companions are added, choose for matching conditions, low disturbance and small adult mouths. Avoid building a community around animals that need the same sheltered patch or take every fine particle before the rasboras can reach it.

Keep an identification record for the group and avoid buying a mixed selection of similar red Boraras as if they were one species. Separate groups are particularly useful for breeding and comparing their behaviour. Shrimp may share appropriate conditions, but eggs and tiny young remain food-sized to many fishes. Compatibility requires an arrangement and an alternative, not a universal safe label.

Phoenix Rasbora is described in aquarium husbandry as an egg scatterer without parental guarding. A conditioned group may release small batches among fine vegetation. Some young can escape notice in a mature display, but a deliberate project needs protected deposition sites and a plan to separate eggs or parents as appropriate.

Prepare very fine first food and protected filtration before attempting to raise a brood. Monitor whether fry can find food throughout their occupied area without food accumulating elsewhere. Spawning water and close nursery management can be more demanding than normal adult maintenance. Do not interpret a small fish hovering beside moss as proof of a spawn, or assume that adult food crushed once will meet every early stage.

Use prepared leaves around wood and planted margins, leaving space to inspect the fish and remove food. The material can add texture and microbial surfaces, but its decomposition also belongs in the maintenance plan. Add proportionate amounts, watch the water and remove harmful accumulation rather than preserving every leaf indefinitely.

If the group hides continually, inspect light, flow, recent changes and social access before adding another treatment. If body condition declines, check mouth-sized food and competition. Fast breathing calls for oxygen and water-quality checks. A useful first response identifies what changed; it does not automatically mean lowering pH or adding more botanicals.

For a modest botanical edge beside the shoal’s open water, compare Banana Sticks – Twisted Musa Botanical Branches with Dried Cinnamon Leaves – Natural Aquarium Leaf Litter. Choose a small number of pieces around the planting so food remains visible and the floor can be inspected.