"Bob never had a nasty bone in his body - he never had an enemy. He was a people-person.
"He had a wide circle of friends and he loved a good joke. He had a wonderful sense of humour.
"One of his greatest interests was world travel. He travelled extensively to many corners of the globe."
Mr Clearwater said his brother loved fishing, but he did not go out on the open water often.
He said Bob and Brian had been sitting around the night before the tragedy, discussing the beautiful weather forecast for the city this week, and both decided to go fishing for mullet the next day.
"Papanui Inlet is usually quite safe, for the most part, because it's normally shallow.
"They weren't expecting any trouble. They could both swim, but they were not proficient swimmers."
Mr Clearwater said his brother was "relatively fit" but believed he may have suffered a medical incident while in the dinghy, because he stood up in the boat and both the occupants knew not to stand up in a small boat.
The death has been referred to the coroner.
A Dunedin Hospital spokeswoman said Brian remained in Dunedin Hospital and his condition was causing concern yesterday.