Max Size: 18cm

Blue Botia (Yasuhikotakia modesta)

Young Blue Botias are an attractive, impressive and active schooling fish. However, As they grow older, they spend more time hiding under rocks or in caves in seclusion. Like many other loaches, Blue Botias are a nocturnal species that comes out at night to dig through substrate and gravel for food.

Blue Botias are mildly aggressive but enjoy the company of their own species. In their natural habitat, they often school up with other mildly aggressive species of the same size.

In an aquarium environment, these Botias fair better in groups of six or more otherwise if housed alone in a community aquarium, they usually become aggressive towards other similarly shaped fish. If you keep these fish in pairs or small groups of 3 or 4, the dominant fish will usually bully the other fish to the point that they stop eating.

Due to the Botia Loaches potentially large size, they will require a large tank with excellent filtration and regular water changes because they are intolerant of organic waste accumulation, meaning they need spotlessly clean water to thrive. Therefore these fish are not recommended for the beginner aquarist.

The blue botia has an elongated, heavily built compact body and arched back. Their body is bluish-silver almost grey, and in specific lighting, you may sometimes notice a green sheen on it. The fins on these fish can differ in colour from bright red to orange, and on rare occasions, they can be yellow.

As juveniles, Blue Botias have vertical bars running along their flanks that eventually disappear as they reach adulthood.

Like all species of loach, they have four pairs of barbels that protrude from their mouth, and although they are often referred to as being scaleless, they do have small scales on their body.


Blue Botia
Blue Botia
Quick Facts
Scientific NameYasuhikotakia modesta
Other NamesRedtail Botia Loach, Red-finned Loach, Red-tailed Blue Loach
OriginsCambodia, Laos, Thailand, Vietnam
Aquarium LevelBottom
Best kept asGroups 6+
Lifespan5 - 7 years
Water Parameters
Water TypeFreshwater
PH6.0 - 7.5
GH8 - 12
72 - 86℉
22.2 - 30℃


In the home aquarium, the Blue Botia 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 quite challenging to differentiate male and female Blue Botias. The only noticeable differences you can see is the fact that sexually mature females seem to grow a bit bigger than males and are fuller-bodied, especially when full of eggs.

Other Loaches of interest

Bengal Loach(Botia dario)
Chinese Hillstream Loach(Pseudogastromyzon cheni)
Clown Loach(Chromobotia macracanthus)
Dwarf Chain Loach(Ambastaia Sidthimunki)
Fork Tailed Loach(Vaillantella Cinnamomea)
Gold Ring Butterfly Loach(Sewellia lineolata)
View all Loaches
Date Added: 20/11/2020 - Updated: 19/01/2022 16:15:40