Inu was charged with a dangerous throw by the match review committee for his tackle on Rabbitohs fullback Greg Inglis in the 68th minute of the match last week.
Coach Des Hasler had thought about seeking a downgrade but decided it was the better option to take the early plea.
In this instance we tried to look for some comparable grade three charges from the past but we seemed to have found a number of grade twos, he said.
We have chosen to take the early plea and Krisnan will miss the next five matches.
For the Holden Cup side halfback Jaline Graham will also miss their clash with the Sea-Eagles after being charged with a dangerous contact (contact with kicker) charge. The early plea is 187 points with Graham set to miss just the one match. He will be available for selection next week when the Bulldogs take on the Roosters.