Max Size: 13cm

Porthole Rasbora (Rasbora cephalotaenia)

In the aquarium trade, the Porthole Rasbora is a lesser-known species. Nonetheless, they make excellent additions to a friendly community aquarium of Southeast Asian or Indian fish species since they are peaceful, active, and hardy.

It is best to keep Porthole Rasboras in groups of six or more individuals since they are sociable fish. In addition, they show better colours in the company of their species because they are less nervous.

Suitable tankmates for these Rasboras include similarly sized Rasboras, Loaches, peaceful Barbs, and Gouramis. Due to their active nature, these fish require an aquarium with plenty of swimming space; therefore, you should have an aquarium of no less than 255 litres.

The Porthole Rasbora thrives in biotope aquariums. Soft, sandy substrates with driftwood tangles and roots, shaded areas, dried leaf litter, peat, and dim lighting are all necessary. In addition, it is ideal to use tannin-stained waters from wood and decomposing detritus.

The Porthole Rasbora can grow up to 13 cm in length; their silver bodies can appear pinky blush in certain lights. A horizontal line can also be seen on their bodies as dark dots.


Porthole Rasbora
Porthole Rasbora
Porthole Rasbora
Porthole Rasbora
Quick Facts
Scientific NameRasbora cephalotaenia
Other NamesNone
OriginsChina, Laos, Vietnam
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH5.0 - 7.5
GH1 - 12
71 - 79℉
21.7 - 26.1℃


In the home aquarium, the Porthole Rasbora will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Sexual Dimorphism

It is somewhat difficult to distinguish the males from female Porthole Rasboras. However, Mature females appear to be rounder in their stomachs and often a little larger than the slimmer, smaller males.

Other Rasboras of interest

Black Line Rasbora(Rasbora borapetensis)
Blue Line Rasbora(Rasbora sarawakensis)
Chilli Rasbora(Boraras Brigittae)
Clown Rasbora(Rasbora kalochroma)
Dwarf Rasbora(Boraras maculatus)
Emerald Eye Rasbora(Brevibora dorsiocellata)
View all Rasboras
Date Added: 12/07/2021 14:24:36 - Updated: 10/08/2022 18:31:26