Leading to changes in sailors, too. Not just that selkies are favored where before, unable to conjure a boat from a leaf or a flower petal*, they were most decidedly not. Even among the non-selkie sailors, there has been a decided shift in sailors.
One brownie's an admiral, but so's one -- troll or ogre or even trow, I haven't decided yet. And the second one's rather more typical of the navy as it shifted. Something about nonmagical and even anti-magical property to make brutal strength that much more important. And it's shifted male. And those woman sailors who enlist now definitely come of giant or such like stock.
And the writer is noting to herself that this is all back ground and she's going to have to subordinate it to the plot and possibly even suppress it entirely.
*Flower petals were uncommon. Nevertheless, every fairy navy ship is named from a flower.