TUNA competitors recorded impressive results across successive weekend events.
The Causeway Coast Olympic Triathlon featured Phil Castles with the fastest bike split towards fourth overall.
Paul McManus, Craig Harrison, Gary McDonald and Jonathan Walker were the next TUNA athletes across the line to place inside the top 30.
Christopher O’Carroll used the event as preparation for his Ironman appearance next month in Dublin.
Jason Holmes and Adrian Woolsey each posted times around the three-hour mark.
The Peninsula Sea Sprint Triathlon had four TUNA representatives in the entry list.
Castles wrapped up the swim in 12.51 towards third.
Craig Harrison was inside the top 20 followed by Paul Skelly and David McCready.