Fifty inflatable poos have been floated on the Waikato River to protest against the Government's new freshwater standards.
Campaign group Action Station organised the stunt in advance of a meeting of environmentally conscious National Party members.
The Action Station protesters yelled, "Cut the crap, National", as the poo emojis drifted on Lake Ohakuri.
Action Station campaigner Laura O'Connell-Rapira said the proposed new water standards would not improve the quality and instead result in more ecoli from "poo and wee" in the water.
"We decided to have some fun with the emojis to illustrate our point, but this is not a light hearted issue," she said.