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If you’re a fan of compact tanks we highly recommend considering Zebra Danios. Most specimens will stay small, making them a very popular nano fish. Author Note: They are capable of reaching lengths of up to three inches. The rate at which they breed means you will always need to keep a careful eye on your tank. The typical Zebra Danio size is around two to two and a half inches long. This is in preparation for the breeding process and eventual nursery. To maximize your zebra danio’s lifespan, you need to fulfill all of their needs: Maintain the temperature between 64F and 82F (17.7C to 27. However, every individual danio is different and its lifespan depends on the level of care it gets. Spawning is induced by temperature and the fish embryo develop rapidly with all major organs appearing within 36 hours of fertilization. Before they breed, you should separate these female Danios to separate tanks. The lifespan of a zebra danio is two to five years. Zebra danios while living in an aquarium or fish pond have a lifespan of around 2 to 3 years, though, in ideal conditions, this may extend to over five years. Therefore, if you have 4-5 female danios in your breeding tank, expect up to 500 eggs. If you are looking to breed your pairs then you will need to make sure that you are ready to invest the time and money into doing so. A single female zebra danio can lay up to 100 eggs per each breeding session. This is one of the first types of tropical fish to ever be kept in the aquarium, and it is still. Its easy to recognize with its attractively striped, black and white 'zebra' patterned body. Zebra danios are a wonderful addition to your home aquarium but they can be a bit of a handful. Ashis Traders - Offering Multicolor Zebra Danio Fish, 4-5 Year, Size: 1-4 Inch at Rs 3/piece in Howrah, West Bengal. The Zebra Danio Danio rerio (previously Brachydanio rerio) is a lively little schooling fish that only reaches about 2 1/4 inches (6 cm) in the aquarium. This will even out the male-female balance in the tank and stop the competition for breeding. You will need to purchase and add more female zebra danios to your home aquarium. If this is indeed the problem then it is simply rectified. The males will fight to breed with the female zebra danios, and as they typically mate for life, this can be a problem causing serious competition between the male zebra danios. However the fish keeps floating up easily, but manages to stay down at the same level - leading me to conclude it might be swim bladder disease. In fact it is bossy - but this only started today and the bloated Danio has been bloated since I got it. If you have too many males compared to the number of females in your tank then this may be the cause. One of the Danios is chasing all of the other Danios around.

Fish chasing each other can be a form of aggressive behavior.