Jordanes , river Flutausis

I am curious which actual river mentions Jordanes in his Getica when he
stories about the country of Gepidae . The name used by him is
"Flutausis" and should be indeitfied with which river today?

33 (Getica)
..nam Tisia per aquilonem eius chorumque discurrit; ab africo vero
magnus ipse Danubis, ab eoo Flutausis secat, qui rapidus ac verticosus
in Istri fluenta furens divolvitur."


P.S.
has anyone any idea about how is considered by experts the fact Iordanse
in Getica does not mention at all Dekebalos and the wars of 101-102 /
105-106 with the romans?

Alex