Brachydanio kerri – Blue 'Danio' (Danio kerri) — Seriously Fish

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Blue Danios
Another danio species is the blue danio D. kerri. Although not typically as flush with cobaltine coloration as their pearl danio kindred, the blue danios are an excellent aquarium addition, for they are long lived, nearly as hardy as the zebra danios, and in captivity they readily form very tight schools whose individuals move together with such speed and precision as to give the illusion that the school is a single, uniform entity. It is rare to get this caliber of schooling formation from any other danio species. Wearing a base coat of silvery to coppery scales along the head and dorsum, these fish have a splash of electric blue intermingled with golden speckles and stripes toward the middle and back portions of the flanks. Like the black-spotted danio, this species also bears long, thin barbels extending from its chin. This species has no special requirements in the tropical community aquarium.
Royal Blue Danio, Featured item. #royal #blue #danio #fish #petfish #aquarium #aquariums #freshwater #freshwaterfish #featureditem
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This small beauty will reach only about 1 1/2 inches (4 cm) in length but should not be confused with another similar danio species, the Blue Danio or Kerr's Danio . Though they both have blue coloring, they are quite distinctive from each other. The is slightly larger at just under 2 inches (5 cm) and lacks the long fins. It also has a powdery blue color on its flanks contrasted with one or more strong, pinkish-gold horizontal stripes running from the tail to about halfway up the body. The stripes can be broken, but overall this fish lacks the spotted effect of the Longfin Blue Zebra Danio. Royal Blue Danio, Featured item. #royal #blue #danio #fish #petfish #aquarium #aquariums #freshwater #freshwaterfish #featureditem
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Photo provided by FlickrRoyal Blue Danio, Featured item. #royal #blue #danio #fish #petfish #aquarium #aquariums #freshwater #freshwaterfish #featureditem
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The Blue danio is hardy little aquarium fish highly suitable for beginners. It is a friendly species that won’t hurt or disturb anything that is too large to be eaten. They are a shoaling fish and should never be kept in groups of less than 6-8 specimens. An even larger shoal is better. This species is relatively common in the aquarium trade and you should be able to find it if you want it. The Blue danio was very popular in the old days due to its hardiness and due to the fact that it accepts colder water. This species still deserves our love and attention.The Blue danio prefers clean well oxygenated water and good filtration is therefore important. You will often sea your danios playing in the strong current near the exhaust vent on the filter. Using an air pump to get a higher oxygen level in the water can also be a good idea if you keep a lot of fish and few plants in your tank. Blue danios like it when the morning light hits the aquarium but this can cause an algae problem unless you have creatures in the tank willing to eat algae. Moring light is not necessary for their well fare; they will thrive even without it.The Blue danio requires very little from the fish keeper and will fit right into most setups as long as you avoid the extremes. You can to a large extent model the decoration after the need of your other fish species as long as you leave open areas for the Blue danios to swim in. If you want to take the preferences of the Blue danios into consideration you can include a few densely planted areas along the sides and the back of the aquarium. The Blue danio can be sexed in the same way as other danios, e.g. the Zebra fish. The males are smaller and more slender. The females are larger and much fatter. It is very easy to tell and adult male from an adult female. The Blue danio is very easy to feed and will accept just about any food. They can be kept and bred on high quality flake food alone but should preferably be provided with a more nutritious and varied diet. You can for instance use flakes as a base and supplement with both meaty foods (such as frozen and live mosquito larvae) and vegetables. Well fed fish will show more vibrant colours.The Glofish is a genetically modified zebra danio that comes in several different fluorescent neon colors such as red, green, orange, blue and purple. You can now get other species such as glofish tetras as well. The Glofish was genetically modified with the purpose to detect environmental pollution. Scientists were able to inject a fluorescent protein gene (from marine organisms) into the zebra danio embryos to create the glofish. There are no dyes or color injections into this fish. Successive offspring get the gene passed down to them from parents. They are still working on developing a fish to only fluoresce when in the presence of pollution and a portion of glofish sales goes to the advancement of this research.