Inland Fisheries Ireland (IFI) is undertaking four separate investigations in counties Cork, Kerry and Galway this Friday.
At Curraghalicky Lake near Dunmanway, Co Cork, several hundred dead juvenile bream have been recovered.
The Environmental Protection Agency, Cork County Council, the Marine Institute and the River Basin Management Service have been notified and the national inter-agency protocol for investigating significant fish has been activated.
Following a report of heavy discolouration in the river, IFI is investigating a second incident in Cork in the Ross River, Killavullen, with a suspected pollution being the issue there.
IFI was made aware of the issue through a call to its 24/7 confidential number and no dead fish have been reported thus far.
Cork County Council has been notified.
Galway
Up to 120 fish have died in a fish kill in Co Galway, including include salmon, trout, perch, stone loach, stickleback and lamprey, according to IFI.
A suspected pollution incident occurred on a tributary of the Dunkellin River in east Galway and IFI has been on site and assessing the event since Thursday.
IFI is probing a definite line of inquiry about a possible source of pollution which caused this harmful event and the impact will continue to be monitored and assessed in order to identify the cause of the fish kill.
Other agencies have been notified about the incident, including Galway County Council and the Environmental Protection Agency.
Kerry
A fourth investigation is under way following a suspected pollution incident in the Deenagh River at Killarney, Co Kerry, but no dead fish have been reported.
Kerry County Council, the National Parks and Wildlife Service and the Environmental Protection Agency are involved in the investigation.
IFI continues to urge the public to report fish kills, water pollution, habitat destruction or illegal fishing to its confidential 24/7 number 0818 34 74 24.
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