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I have a feeling that yellowish galaxy is nowhere near NGC6744. That tidal stream is just a matter of juxtaposition. But then again, I maybe wrong as I don't know how far away that small galaxy is.
There is a tidal stream there, though. See the companion above the main spiral (the "bar" running perpendicular to the spiral...it's a Magellanic Class barred irregular), there's a definite trail of stars and (most likely) gas there. As a matter of fact, if you look closely, you can see very faint OB associations in the stream. There's most likely also a degree of very distorted spiral arm from the main galaxy mixed in there as well.
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