Definition of "danio"

Danios are very similar to barbs but are much slimmer-bodied.

1995, Mary Bailey, The Ultimate Aquarium, Smithmark, page 158

To me, however, they are more reminiscent of leopard danios than livebearers.

2007, Tropical Fish Hobbyist, volume 56, numbers 1-4, TFH Publications, page 51

For example, danios need to be fed often because they have high metabolism rates.

2019, Madelaine Francis Heleine, Freshwater Aquariums For Dummies, Wiley (For Dummies), page 155