South Esk Swimming Club dominated proceedings at the Northern Regional Championships on Sunday.
The oldest existing club in Tasmania won 16 out of a possible 20 relays in a show of its strength.
Launceston Aquatic was their biggest challenger win three relay wins.
South Esk swimmers Morgen Hawkins, 19, Kit De Jong, 18, and Harry Reid, 12, all won four gold medals.
Launceston Aquatic Club 12-year-old Amy Muldoon also captured four wins from four swims.
The Northern Regionals held a full program of 102 events to fully launch the summer season.
The meet also played host to 158 swimmers from seven clubs, including seven “exhibition” competitors from two guest Hobart clubs that were ineligible to win medals.