Finnick has to laugh at her description of seabirds, because he's lived around ports all his life, in the parts of District Four where the fishing is done: the fishery he'd lived in as a child before he'd become a Career, the main city where the Academy and the Victors' Village are. This place is the furthest he's ever lived from a port and the attendant fishing fleet and seabirds in his life.

"I've mostly learned about geese by necessity. But I'm a sailor, been around docks all my life until this place, so I know what you mean."

It's an elided personal history, but there's nothing untrue in it, except perhaps the suggestion that he'd have called himself a sailor when he was a new victor, drunk on everything his new money could buy and the fame that came with it.

"Finnick Odair," he offers. "Annie's husband and sometime goose-sitter."