The mouth of the river has also altered a great deal over the last fifty years according to the group. Alice says that "with all of the four-wheel drives and action along the bar, it doesn't get as much chance to scour" and that it does not get to flush out naturally as often. The bar was "broken by the Shire because of pressure from fisherman, however, it closed up within a matter of days" says Alice who agrees with Athol and Jess, Mick and Max that when it comes to nature it is best left to take its own course. Some community members are concerned however because the mouth has changed as a result of floods and the water now cuts into the south-eastern side to the "Paperbarks" picnic area. Max said that the mouth "continues to change with each flood and heavy rain". Athol and Jess said that the bar is a lot wider than it used to be.

Further up in the catchment John has watched the river break Devils Creek Road more than half a dozen times and seen the water get up to the Maringarup sign (about ten metres higher than the road crossing). John says that farming has caused a lot of runoff. Max also feels that "there is more water flowing, more often".

Aquatic weeds were also mentioned when the group was asked if they had noticed any changes in the river. Athol and Jess and Max have noticed that there has been an increase in the growth of weed (algae) in the river. Mick feels that the amount of weed that is present depends on the season and the salinity of the water and Alice feels that now that the estuary is shallower the weed is more obvious but she did mention that the estuary "seems to get more algae".

Alice has noticed that there are not as many whiting in the river as there used to be and Max said that bream breeding is greater and there is more mullet although they are smaller because the river is more consistently open to the sea. Marine fish species are becoming more common in the river, especially near the mouth (King George whiting).

Mick, the keener fisherman says that he has never seen the river and the estuary "look so healthy" and he has "never seen so many species of fish". This summer and autumn the river has been very productive with crabs and prawns and various fish species including: bream, mullet, herring, cobbler, leather jackets, flounder and salmon trout. Over the last few years the water has been "so much cleaner" says Mick and many of the residences of Bremer attribute this to the town being connected to underground sewage. The Bremer River and Wellstead Estuary has, in Athol and Jess's opinion, always been very productive. This amazes Athol because it is the shortest river along the south coast and it is shallow (no more than three feet in depth).