Ganguly had a two-Test ban overturned last week
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India captain Sourav Ganguly has been fined 30% of his match fee for showing dissent during day four of the second Test against South Africa.
Match referee Jeff Crowe said Ganguly should bear extra responsibility as his team's captain.
"The behaviour is unacceptable in maintaining the standard in international cricket," Crowe added.
Ganguly disapproved when umpire Daryl Harper turned down an appeal for a catch against Jacques Kallis.
TV replays suggested the batsman had nicked the ball to forward short-leg.
India's close fielders appealed several times during the final session, which the touring side finished on 172-5, just 66 runs ahead.
Coach John Wright felt they should have shown more composure.
"They are passionate players and I want that passion from them," he said.
"But they have to learn to control their passion and aggression."
The usual punishment for dissent is an official reprimand and a fine of up to 50% of his match fee.
Ganguly successfully appealed to the International Cricket Council (ICC) against a ban imposed after his team's one-day defeat by Pakistan at the same venue last month.
On that occasion he was charged with allowing his bowlers to take too long during the Pakistan innings.