HUGE things, nearly five or six feet long and they were this dark dusky jade with flickers of gold over big, flat scales and ugly looking snouts... They'd eat a fish carcass in a single snap, and the fisherman warned some boys to not swim around them. They really made me think about Jyuushiro's zanpakutou in a mildly different light.
Here's the closest picture I took. There's more on Flickr, too, now.