Possibly Potamogeton tricarinatus - see ref below - but was photographed at Hidden Secret Rockhole in the Doctor Hicks Rng GVD, which is a long long way outside the known range.
Lovells Springs P/L
DIESELHEAT
Bushtracker
Edwards Tavern WODONGA Vic
ARB CAPALABA
BTA Towing Equipment
Hitch-Ezy Inventor
Absolute Trailer Solutions
Bushtracker Owners Group Inc.
COOKTOWN HOLIDAY PARK
Atlas Travel Centre
ABCO Caravan Services
SIMPLICITY AXLES
Email