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It's a peaceful fish towards anything that doesn't fit in its mouth... Once it gets full size not only will it be too big for your tank but it will also have no problems eating those danios.
I had a Peacock Eel that did well in my 45ga community tank but he spent a lot of time in the gravel and we rarely saw him. I think the Dojo Loach was too much competition for him. I've gone with color in that tank - Sunset Gourami, Rainbow & Buenos Aires Tetra, Golden & Cherry Barbs, Longfin Rosy Barbs, a Yellow Kili and a couple of Swordtails.
Dojo Loach all the way, the craziest fish you will ever own, bags of personality and if it doesn't make you laugh at least twice a day it's sick. I'm thinking about setting up a Dojo tank later this year, or weather loach as there mainly called over here - great for letting you know when it's about to rain!