Max Size: 10cm

Blood Tailed Danio (Devario annandalei)

Blood Tailed Danios are active, reasonably hardy and friendly fish making them an excellent addition to a peaceful community aquarium, especially if you already keep larger species. However, these Danios are among the biggest Danios and require a large aquarium with plenty of swimming space. Nevertheless, these Danios can thrive in various temperatures and water parameters, so they are suitable for the beginner aquarist, providing they have a large enough aquarium.

Blood Tailed Danios are a shoaling species in nature; therefore, it would be better to maintain them in groups of six or more individuals. Suitable tankmates for these Danios could include medium to large-sized Danios, Barbs and Rasboras, as well as peaceful Cichlids, Catfish, and Loaches. However, it would be better to avoid smaller species as they may be seen as a snack or slow-moving species as they may feel nervous around these active fish.

The aquarium will need to be well oxygenated and have a reasonable flow rate as these fish will enjoy swimming against the current; therefore, adding a powerhead or an internal filter would be ideal. Since these Danios naturally occur in pristine habitats, they are intolerant to the buildup of excessive organic waste. Therefore these fish require good water conditions to thrive, and you should never introduce them into a biologically immature aquarium. In addition, the aquarium will need a tight-fitting lid as these Danios are accomplished jumpers.

Blood Tailed Danios have a metallic silvery-blue body colour with yellowish-orange lines and dots on the flanks starting from the gills and running through to the base of the caudal fin. In addition, these Danios also have blood-red and light blue colouration between the caudal fin rays. All the other fins on this fish are transparent.


Blood Tailed Danio
Quick Facts
Scientific NameDevario annandalei
Year Described1908
Other NamesNone
OriginsChina, Thailand
Aquarium LevelMiddle
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan4 - 8 years
Water Parameters
Water TypeFreshwater
PH6.5 - 7.5
GH5 - 15
KH4 - 8
71 - 79℉
21.7 - 26.1℃


In the home aquarium, the Blood Tailed Danio 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

Blood Tailed Danios can be quite difficult to distinguish between males and females. Females are typically larger, have a more rounded abdomen, and are less vibrantly coloured than males. In contrast, males are slimmer and more brightly coloured than females.

Other Danios of interest

Assam Danio(Devario assamensis)
Barred Danio(Devario pathirana)
Bengal Danio(Devario devario)
Black Barred Danio(Danio absconditus)
Blue Danio(Danio kerri)
Celestial Pearl Danio(Danio margaritatus)
View all Danios
Date Added: 02/03/2022 11:33:28 - Updated: 11/08/2022 14:55:36