A sea swimmer was taken to hospital after being rescued by the emergency services on Dublin Bay on Thursday afternoon.
The swimmer got into difficulty in big seas off the Forty Foot bathing place.
The RNLI Dun Laoghaire Lifeboat Station inshore lifeboat crew recovered the swimmer from the sea and brought the casualty to the Coast Guard crew at Sandycove Beach.
The Dun Laoghaire Coastguard team responded along with Rescue 116 helicopter, RNLI Dun Laoghaire Lifeboat Stations ALB and ILB, the National Ambulance Service (NAS) Paramedics, Dublin Fire Brigade Paramedics & Advance Paramedics and An Garda Síochána.
Immediate medical treatment commenced on the beach, and the casualty was transported to hospital in a 'very serious condition', according to the Coastguard.
Dun Laoghaire Coastguard said" "Conditions were not ideal for swimming due to Easterly winds. Please exercise caution when making a decision to swim. Any doubt, don’t swim!".
Last night seas remained big on Dublin Bay, forcing the cancellation of DBSC's Thursday night racing.