Zebra Danios are a favourite of freshwaterfish hobbyists because of their ease of care. They are also prolific breeders and the easiest type of egglayers to breed. With their attractively striped, black and white zebra-patterned bodies, these fish are easy to recognise. Zebrafish are very durable and can withstand an impressive range of water temperatures and conditions. They will generally do just fine without a water heater as they are comfortable at temperatures down to the low 60s F.