Max Size: up to 15 cm

Blue Spotted Hill Trout (Barilius bakeri)

The Blue Spotted Hill Trout is not suitable for the general community aquarium. This is because of its environmental demands, and the fact that they are likely to outdo and intimidate slow-moving and less bold species at feeding times since it is a swift swimmer and vigorous feeder. It would help if you also excluded much smaller fish as they may predate them. Therefore the best tankmates for these fish are similarly-sized, robust, similarly competitive cyprinids.

It would help if you kept these fish in groups of 5 or more as this will allow them to develop a pecking order which will prevent smaller fish being targeted.

The Blue Spotted Hill Trout is not suitable for the beginner aquarist as they are intolerant to the build-up of organic waste and require pristine water at all times to thrive. It will also fair better if there is a moderate degree of water movement and a high balance of dissolved oxygen.

This fish displays a single row of bluish-green spots along the stretch of the body with the last spot being a much darker blue to black. These spots begin to get smaller and fade slightly as the fish ages. White specks are also present on the tip of the dorsal and anal fins.

Quick Facts
Scientific NameBarilius bakeri
Other NamesRoyal Danio, Blue-dotted Mirror Fish
FamilyCyprinidae
GenusBarilius
OriginsSouth India
TemperamentSemi-Aggressive
Aquarium LevelMiddle - Top
DifficultyIntermediate - Advanced
ShoalingYes
Best kept asGroups 5+
DietOmnivore
ReproductionEgg-Scatterer
Lifespanup to 10 years
Water Parameters
Water TypeFreshwater
Temperature64 - 79 ℉ (17.8 - 26.1 ℃)
PH6.0 - 7.5
GH2 - 10
TDS18 - 179
Blue Spotted Hill Trout
Blue Spotted Hill Trout
Blue Spotted Hill Trout
Blue Spotted Hill Trout

Habitat

The Blue Spotted Hill Trout is endemic to Vamanapuram, Kallada, Ithikkara, Karamana, Bharatapuzha, Muvattupuzha, Periyar, Kabini, Chalakudy, Valapatanam, Chaliyar, Neyyar, Pampa, Meenachil, Manimala, Achankovil, Pambar, Chandragiri, Karyangode, Kuppam, and Bhavani River Systems as well as the Western Ghats mountains in southwestern India.

These species inhabit well-oxygenated, moderate to fast-flowing rivers and streams at medium to high altitudes and their substrate is usually either cobbles, gravel, exposed bedrock or large boulders.

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Diet & Feeding

In captivity, you can offer them high quality dried products such as flakes and granules, but you should supplement that with frequent meals of live and frozen food such as bloodworm, chopped earthworms and Artemia. Bear in mind this fish is a surface feeder so will not touch any food that falls to the bottom.

Sexual Dimorphism

It is relatively easy to differentiate the sexes in the Blue Spotted Hill Trout. Adult females are not as vividly coloured as the males and grow thicker bodies and are generally more massive than the males, especially while gravid. In contrast, the males when in courting develop tubercules on their head, and the lower section of the body reveals orange pigmentation.

Breeding

Unfortunately, there are no existing reports of breeding successes; however, some have said that spawning can be stimulated by performing massive water changes with cold water, but raising the fry has been impossible.

Frquently asked questions about the Blue Spotted Hill Trout

Are Blue Spotted Hill trouts a shoaling fish?

Although the Blue Spotted Hill trout is gregarious by nature, they are a shoaling species rather than a schooling species that develop a distinct pecking order. Therefore, you should always maintain these fish in groups of five or more individuals. If you only purchase two or three of these fish, the subdominant individuals may be bullied continually, and single specimens can become aggressive towards similar-looking species.

Can you house Blue Spotted Hill trouts in a community tank?

Unfortunately, the Blue Spotted Hill Trout does not work well in most community aquariums. These fish can grow up to 13cm; they are speedy swimmers and voracious feeders and may also predate on smaller tankmates; therefore, only similar competitive fish should be considered tank mates. This species also requires pristine water quality with high oxygen content and no organic waste, also making them unsuitable for the community aquarium.

How can you tell if your Blue Spotted Hill Trout is male or female?

Usually, adult females are less-brightly-coloured and tend to grow slightly larger and thicker-bodied than males, especially when gravid.
Nuptial males develop breeding tubercles on their heads and display orange pigmentation on the lower portion of their body.

What does the Blue Spotted Hill Trout look like?

Blue Spotted Hil Trouts have silvery-blue bodies with around ten darker, metallic-looking narrow bands or blotches on the flanks. The males have orange edges to their anal and caudal fins, whereas the females are white.

What should I feed my Blue Spotted Hill Trouts?

The Blue Spotted Hill Trout is predominantly a surface feeder consuming a mixture of terrestrial and aquatic insects. You can replace this with good quality dried food such as large flakes and pellets supplemented with regular live and frozen foods such as daphnia, bloodworm, chopped earthworm and artemia.

You may also give them fruit flies and small crickets, provided they are gut-loaded before use.

Where does the Blue Spotted Hill Trout originate?

Blue Spotted Hill Trout is endemic to the Western Ghats mountains in southwestern India. These fish inhabit low-to-medium gradient, moderate to fast-running streams and well-oxygenated rivers, with substrates of cobbles, gravel, large boulders and exposed bedrock.

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Date Added: 30/10/2020 - Updated: 30/10/2020 12:36:34