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I have six Long Fin Zebra Danios also.....well....actually they are my girlfriends but I take care of them! Really active and cute little critters. One may just be pregnant as well.
Thanks for the input. They are about 3 inches long and colored blue, redish brown and about 1/4" to 1/2" wide depends on which on you look at. They are really really active and sometimes they splash the surface of the water.