The lanky Delhi seamer was found guilty of violating clause 1.6 of ICC code of conduct - disrespecting opposition player or team on the field- during the disciplinary hearing on Monday.
However Symonds who started it all was left scot free.
It all started when the burly Queenslander was dismissed in the penultimate over of the Aussie innings by Ishant.
Television replays showed that the Ishant, the revelation for India in the ensuing tour, replied with a mild gesture showing Symonds the way to pavilion after the Aussie all-rounder, being foxed by a slower one, said something in an aggressive tone to the bowler.
Earliier, the 19-year-old was penalised for showing the dissent to umpire Bucknor when Symonds was not given out at the controversial Test match on the same venue last month.
Symonds was at the centre of the Harbhajan Singh controversy during an often heated Test series, when the Indian spinner received a three-Test suspension for allegedly racially abusing the Australian.
The suspension was subsequently overturned at an appeal hearing.
Rival captains play down incident: Meanwhile India skipper Dhoni and his Aussie counterpart Ponting played down the Ishant-Symonds face-off.
Speaking after Sunday's match, Dhoni said he told Ishant Sharma to 'cool down' at the time.
Australian captain Ricky Ponting said not to read much into it (Ishant-Simmo spat).
"There was a minor altercation out there today and I don't think we should make too much of it," Ponting said.